Neuropathic Pain Medications – review & metanalysis of 229 studies


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This review was done by many of the best pain specialists from all over the world. You will not find answers in that large review if neuropathic pain has already failed tricyclic antidepressants (Elavil, amitriptyline, Norpramin desipramine, others), gabapentin (Neurontin), pregabalin (Lyrica), lidocaine, capsaicin, or opioids. That is the current paradigm. A new paradigm – glial modulators  – that I discuss on this site, may or may not give relief.

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A member of the International Association for Study of Pain, IASP, published a brief critique of that comprehensive review of 229 trials of medications for neuropathic pain published in Lancet Neurology February 2015. The critique is posted below, done by a member of the Neuropathic Pain Special Interest Group, NeuPSIG.

 

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To understand the metanalysis of these 229 trials, you need to understand the simple concept of number needed to treat, NNT.

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NNT is an estimate of “the number of patients that need to be treated in order to have an impact on one person.”

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The smaller the number, the more effective the drug. Example, NNT of 7.2 for gabapentin means you need to treat  7.2 people before a response. If 3, need to treat 3 before a response.

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Barsook (Harvard, ref. below) reviewed ketamine studies in 2009:  “they did show a level of efficacy (of ketamine) based on NNT that equals or betters most drug trials for this condition.”

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“NeuPSIG has just published an up to date systematic review on the effectiveness of pharmacotherapy in Lancet Neurology. They have negotiated with the journal to make it available beautifully open access. You can download it for free here.”

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Neil O’Connell, Brunel University London

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“This is a comprehensive review, containing 229 trials of the full range of pharmacological agents using robust methods, to synthesize, summarise and make value judgements about the quality of the available evidence. So what are the take home messages?”

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“Using a primary outcome of achieving at least 50% pain relief trial outcomes were described as “generally modest”. The number of patients needed to treat with the drug compared to a placebo for one more person to achieve this outcome ranged from a relatively rosy 3.6 (95% confidence interval 3 to 4.4) for tricyclic antidepressants such as amitryptiline, 4.3 (95%CI 3.4 to 5.80 for strong opioids to a less impressive 7.2 (95%CI 5.9 to 9.21) for gabapentin, and 7.7 (6.5 to 9.4) for pregabalin (often sold under the brand-name Lyrica). It’s interesting, at least to me, how much better the older more traditional agents seem to have fared compared on effectiveness to the more modern (and commonly more expensive) agents although the safety and tolerability of gabapentin seems superior.”

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“The spectre of publication bias also raises its head. The reviewers carefully took a number of routes to try to unpick this notoriously difficult issue and estimate that there has been overall a 10% overstatement of treatment effects. Published studies reported larger effect sizes than did unpublished studies. This is not a problem restricted to the field of pain trials. It is a burning issue across the world of clinical trials. It is very important because if we fail to base our clinical recommendations on the totality of relevant evidence (because some data are hidden from us) we are in danger of mis-estimating the benefits and the harms and as a result patients are put at risk. If you think that is pretty important then there are ways that you can help. Check out the All-Trials campaign.”

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“Overall what does this mean? Many drugs are effective but not as effective as we would wish them to be. No pharmacological agent really impresses and for any drug the most probable outcome is failure to produce 50% pain relief. There are various potential reasons for this. The first is that the drugs may only be moderately or marginally effective, another is that neuropathic pain includes quite a mixed bag and our ability to accurately diagnose and to target drugs to specific mechanisms in the clinic is currently fairly poor.”

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“The NeuPSIG review team formulate a number of recommendations for revision of their clinical guideline for managing NP pain, balancing the benefits, harms, costs and strength of the evidence.”

  • a strong recommendation for use and proposal as a first-line treatment in neuropathic pain for tricyclic antidepressants, serotonin-noradrenaline reuptake inhibitors, pregabalin, and gabapentin;

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    • a weak recommendation for use and proposal as a second line treatment for lidocaine patches, capsaicin high-concentration patches, and tramadol; and a weak recommendation for use and proposal as third line for strong opioids and botulinum toxin A. Topical agents and botulinum toxin A are recommended for peripheral neuropathic pain only.

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“This email [from IASP’s NeuPSIG] is also published as a blogpost at www.bodyinmind.org”

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References

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Finnerup NB, Attal N, Haroutounian S et al. Pharmacotherapy for neuropathic pain in adults: a systematic review and meta-analysis. Lancet Neurol. 2015;14:2:162-73.

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Glial modulators – another paradigm

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From my January 2012 brief review of publications on ketamine, only one of a handful of glial modulators, this author says reviews “show a level of efficacy based on NNT that equals or betters most drug trials for this condition.

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Ketamine and chronic pain – Going the distance, David Barsook, Director, P.A.I.N. Group, Massachusetts General, McLean and Children’s Hospitals, Harvard Medical School, Boston, MA;

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This paper covers essential points not mentioned by many, thus quoted at length below:

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Our current therapeutic armamentarium is quite limited in terms of analgesic efficacy in controlled trials. Some would argue that the small efficacy (both at a population level and the magnitude of change in VAS score) this is related to the fact that we need to consider mechanistic approaches to chronic pain subgroups. However, patients and clinicians find themselves in a position of “what to do now”.

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Ketamine, brain function and therapeutic effect – neuroprotective or neurotoxic

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With the onset of chronic pain (including CRPS) a number of changes in brain function occur in the human brain including but not limited to: (1) central sensitization ; (2) functional plasticity in chronic pain and in CRPS; (3) gray matter volume loss in CRPS ; (4) chemical alterations ; and (5) altered modulatory controls. Such changes are thought to be in part a result of excitatory amino acid release in chronic pain. Excitatory amino acids are present throughout the brain and are normally involved in neural transmission but may contribute to altered function with excessive release producing increased influx of calcium and potentially neural death. Here lies the conundrum the use of an agent that potentially deleteriously affect neurons that may already be compromised but may also have neuroprotective properties by mechanisms that include reducing phosphorylation of glutamate receptors resulting in decreased glutamatergic synaptic transmission and reduced potential excitotoxicity . Alternatively, ketamine may affect glia regulation of glutamate and inhibit glutamate release within glia. However, by whatever mechanism ketamine acts on CRPS pain, there does seem to be a dose/duration effect in that longer doses at levels tolerated by patients seem to prove more effective in terms of the duration of effects.

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So what could be happening in the brain and what is required to alter brain systems and reverse the symptomatic state? Ketamine may diminish glutamate transmission and “resets” brain circuits, but it seems that a minimal dose and/or duration of treatment is required. Alternatively, ketamine may produce neurotoxicity and damage or produce a chemical lesion of affected neurons. These two issues are important to be understood in future trials. Reports from patients who have had anesthetic doses have included prolonged pain relief for many months. While the authors did not address issues such as the effect of dosing duration or repetitive dosing at say 6weeks, they did show a level of efficacy based on NNT that equals or betters most drug trials for this condition.”

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Conclusions

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As a community we have a major opportunity to define the efficacy and use of a drug that may offer more to CRPS (and perhaps other) patients than is currently available. This is clearly an opportunity that needs urgent attention and a number of questions remain to be answered. For example, is ketamine more effective in early stage disease? How does ketamine provide long-term effects? Further controlled trials evaluating dose, duration, anesthetic vs. non-anesthetic dosing are needed. Few of us really understand what it is like to suffer from a chronic pain condition such as CRPS. Ketamine therapy may be a way forward that can be brought into our clinical practice through further controlled studies that will allow for appropriate standards for use in patients.

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The material on this site is for informational purposes only, and is not a substitute for medical advice,

diagnosis or treatment provided by a qualified health care provider.

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Please understand that it is not legal for me to give medical advice without a consultation.

If you wish an appointment, please telephone my office.

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For My Home Page, click here:  Welcome to my Weblog on Pain Management!

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Be the change you wish to see – or walk away. Money at NIH


 

 

A Turning Point

 

$$$$$ MONEY $$$$$

 

at NIH

 

May not come this way again

 

NIH developing

5-year NIH-wide Strategic Plan

 

 

 

Donate to organizations, below

They can provide feedback to NIH via the

RFI Submission site


 

 

 

John C. Liebeskind, 1935 – 1997, distinguished scholar and researcher, past president of the American Pain Society, had the radical idea that pain can affect your health.

 

Research decades ago by an Israeli team at UCLA and others had shown “that pain can accelerate the growth of tumors and increase mortality after tumor challenge.” Decades ago Professor Liebeskind lectured all over the country: Pain kills.

 

He wrote an editorial in 1991, summarizing a life’s work:

 

“Pain and stress can inhibit immune function.”

 

 

Quoting John Bonica, the father of modern pain management, he wrote:

 

“Bonica has long argued that the term ‘chronic benign pain’ (used in distinction to pain associated with cancer) is seriously misleading.  Chronic pain is never benign, he contends; “it is a ‘malefic force’ that can devastate its victims’ lives and even lead to suicide.”

 

 

Liebeskind continues, “It appears that the dictum ‘pain does not kill,’ sometimes invoked to justify ignoring pain complaints, may be dangerously wrong.”

 

Pain mediates immune function

 

Importantly

 

  Opioids mediate the suppressive effect of stress on natural killer cells,

 

 published in 1984, immune system.

 

Alcohol increases tumor progression, 1992, immune system.

 

It used to be news.

He did not live to see change.

 

People just want to go on doing what they’re doing.

They want business as usual.

 

 

After 1991, we saw the great discoveries of neuroinflammation, pioneered by Linda Watkins, PhD, the early understanding of the innate immune system, its involvement in chronic pain and depression, and a few weeks ago, a British team showed neuroinflammation in teens with early signs of schizophrenia and DNA markers.

 

 

Major Depression has the same neuro-inflammation found in chronic pain, often responding to same medications, in particular glial modulators – immune modulators. Now, perhaps early schizophrenia will respond to glial modulators, reducing inflammation seen on scan in teens, before they become homeless and burned out by antipsychotic drugs

 

Inflammation out of control destroys neurons

 

Fire on the brain

 

 

We must be the change we wish to see

 

It’s not just the Bern. It’s been starting. Forces are finally coming together. We want change. It’s been too much. Too long.

 

We won’t take it anymore.

 

I figure if I tell you about it, you might just mention it to someone to pass it on. That is all. One small action may lead to change. Activate inputs to the NIH strategic plan.

 

 

~ Action needed ~

 

Prices of drugs becoming unaffordable

No new drugs for pain or major depression

Research to repurpose existing drugs

Expose the politics destroying our compounding pharmacies

 

Above all

The #1

Major Priority:

Request NIH to solicit priority call for research on

Glial modulators of the

Innate immune system

 

 

Why?

 

Glia modulate

chronic pain, major depression

and almost every known disease

 

Glia are your innate immune system

 

Inflammation kills

 

 

 

 Stress kills. Inflammation kills.

 

 

Pain kills

 

In the 1970’s, Professor Liebeskind and an Israeli team at UCLA injected cancer cells to two groups of rats that had sham surgery. Cancer spread much faster and killed far sooner in the group with poor treatment of surgical pain.

 

 

~ Pain kills ~

 

He lectured all over the country

 

Forty five years ago

 

 

I’m gonna be dead before I see this country do anything but unaffordable opioids and the magical ineffective trio of gabapentin, Lyrica, Cymbalta to treat chronic pain. The devastating, blind, nationwide emphasis does nothing to address the cause: inflammation, the innate immune system gone wild.


 

 

Innate immune system in action

 

Untreated pain suppresses the hormone systems too.

 

Untreated depression – same inflammation kills lives.

 

Where’s the money?

 

We are the change we wish to see. It’s pitiful I am so lazy. Suddenly, too late, we may need something, but, aha, no new drugs in the pipeline.

 

 

 

~ Make a joyful cry to NIH ~

 

They are soliciting input from professional societies

 

If your condition has failed all known drugs for pain or major depression, then make a joyful cry to NIH, now, before they give away all that nice new $$$$$money$$$$$.

 

 

Follow and join

 

American Pain Society

 

 

International Association for Pain

celebrating 40 years of pain research

 

 

Reflex Sympathetic Dystrophy Syndrome Association

help for CRPS/RSD  

 

 

 

The key to CRPS/RSD pain will apply to all forms of chronic pain, in particular the most difficult form, neuropathic pain. RSDSA funds research into all forms of chronic pain, not only Complex Regional Pain Syndrome (CRPS/RSD). Their scientific board members are not funded by opioid money.

 

 

 

Exactly

what is the annual cost of care

as fraction of GDP

for the growing population of Americans on opioids

for one year, for lifetime?

 

 

People are dying from prescription opioids and those who need them find they don’t work well enough. Prescriptions opioid costs must be a huge fraction of the medical costs in the United States GDP. You are required  to see a doctor every single month each year, often lifelong, just for one opioid, 12 months a year x 30 years x tens of millions of people and increasing – a growth industry. Not even counting $600 a day for the opioid, what the cost of monthly visits for 30 years? Not counting the army of DEA, FDA, CDC agents watching the opioids like a hawk. We all have to be sharp, addiction is growing. Addiction aside, deaths from prescription opioids are shaking up the CDC forcing urgent change this coming month.

 

 

 

Opioids do not work well for chronic pain

We need better

It’s not just the $600/day price

They just don’t work

 

 

donate

 

 

Raise a joyful noise at NIH now or write back at us readers with comments and better suggestions. Tell others what you’d like to see. Which politicians do you know would be most interested in this at national levels and organizations?

 

You may never see this change unless you do it now. Other forces will get this new money.

 

 

Turning point now

May not return

 

 

We are at a turning point and we will fail to catch the sail that’s coming fast to carry all research money in their shiny big stem cell direction. They never look back.

 

 

There is so many medications we can use today, FDA approved drugs that can be re-purposed and applied to recent cutting edge science. Someone must pay to do the work to study this.

 

 

Re-purpose old drugs

 

 

Stanford just showed a popular generic drug improved recovery of stroke paralysis in mice to begin at 3 days rather than 30. Old drug, new purpose, of course more years of testing to confirm in humans. Brilliant team applying new science.

 

 

Request
NIH to solicit a

Special Invitation

for 30 good protocols to

repurpose old drugs

 

 

Hundreds of old drugs, already approved, could be involved in mechanisms we have recently learned about. Speak up or money will go to shiny new stem cells. None for chronic pain or major depression. No company will find this profitable – it must be funded by NIH. A popular generic sleeping pill can bring astonishing return from stroke paralysis.

 

 

Congress has not opened this new money to NIH in many long years. How often will there be extra money?

 

 

donate

 

 

Lawrence A. Tabak, D.D.S., Ph.D.
Principal Deputy Director, NIH, solicits you to

Review the NIH Strategic Initiative Plan and their

Request for Information (RFI) and the NIH website

and provide your feedback via the RFI Submission site

 

 

This is for “stakeholder organizations (e.g., patient advocacy groups, professional societies) to submit a single response reflective of the views of the organization/membership as a whole. We also will be hosting webinars to gather additional input. These webinars will be held in early to mid-August.

 

 

 

Be the change you wish to see

Donate to those organizations

to solicit the change you wish to be

 

 

 

Happy New Year

Rejoice!

There’s money at NIH

 

 

 

 

 

 

The material on this site is for informational purposes only.

It is not a substitute for medical advice, diagnosis or treatment provided by a qualified health care provider.

Relevant comments are welcome.

If any questions, please schedule an appointment with my office.

This site is not for email.

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For My Home Page, click here:  Welcome to my Weblog on Pain Management!

 

 

 

 

Ketamine Pathway for Antidepressant Response – Ventral Hippocampus-Medial Prefrontal Cortex


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Molecular Psychiatry , (1 December 2015) | doi:10.1038/mp.2015.176

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Activation of a ventral hippocampus–medial prefrontal cortex pathway is both necessary and sufficient for an antidepressant response to ketamine

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F R Carreno, J J Donegan, A M Boley, A Shah, M DeGuzman, A Frazer and D J Lodge

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This is an excellent model for studying Alzheimers Dementia and may explain why my patient with Alzheimers has been so stable for so many years. Yale with NIMH had published that ketamine rapidly creates synapses, that led to treating a senior with Alzheimers. This should encourage further research on memory and dementias.

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The material on this site is for informational purposes only.

It is not a substitute for medical advice, diagnosis or treatment provided by a qualified health care provider.

Relevant comments are welcome.

If any questions, please schedule an appointment with my office.

This site is not for email.

~~~~~

For My Home Page, click here:  Welcome to my Weblog on Pain Management!

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Analgesic Response to Ketamine Linked to Circulating microRNA in Complex Regional Pain Syndrome


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Analgesic Response to Intravenous Ketamine

Is Linked to a Circulating microRNA Signature

in Female Patients

With Complex Regional Pain Syndrome

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The ability to measure Micro RNS’s (miRNA) in blood looks like it may become an important tool someday once it is available for the clinic. It could be used to predict if your condition will respond to various medications.

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MicroRNAs are emerging as important modulators of various psychiatric (schizophrenia, bipolar disorder) and neurological conditions including pain, epilepsy, cognitive dysfunction, neuronal development, structure and function. “MicroRNAs are small, non-coding RNAs that act as post-transcriptional regulators of gene expression.  miRNA’s can be affected by morphine and affected by other drugs. It is hoped that complex clinical phenotypes may be profiled in assays of peripheral blood and may predict response to treatment such as in this study. Ketamine is given for selected patients that have failed to respond to standard treatment.

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This research was published in Pain, June 2015, by Professor Schwartzman’s group at Drexel University. Seven of his patients with Complex Regional Pain Syndrome were ketamine responders and 6 were poor responders. They note that, “Although [ketamine] treatment is generally effective, approximately 30% of patients have an inadequate response to ketamine.”

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“Stability in circulation and dysregulation in disease state are 2 features making extracellular miRNAs useful candidates for biomarker discovery. Alterations in miRNA profiles have been reported for rheumatoid arthritis and systemic lupus erythematosus as well as for painful conditions such as irritable bowel syndrome, chronic bladder syndrome, endometriosis, and migraine. Cerebrospinal fluid from patients with fibromyalgia showed differential expression of 9 miRNAs.”

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Quoting directly from the article:

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Highlights

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•We studied ketamine treatment–induced miRNA alterations in blood from patients with CRPS.
•Differential miRNA expression was observed in whole blood before and after treatment.
•Before therapy, 33 miRNAs differed between responders and poor responders.
•Lower pretreatment levels of miR-548d-5p may contribute to higher UDP-GT activity.
•Circulating miRNAs can be potential biomarkers in predicting treatment response.

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From the Abstract

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Investigation of the mechanistic significance of hsa-miR-548d-5p downregulation in poor responders showed that this miRNA can downregulate UDP-glucuronosyltransferase UGT1A1 mRNA. Poor responders had a higher conjugated/unconjugated bilirubin ratio, indicating increased UGT1A1 activity. We propose that lower pretreatment levels of miR-548d-5p may result in higher UDP-GT activity, leading to higher levels of inactive glucuronide conjugates, thereby minimizing the therapeutic efficacy of ketamine in poor responders.

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Perspective

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This study suggests the usefulness of circulating miRNAs as potential biomarkers. Assessing miRNA signatures before and after treatment demonstrated miRNA alterations from therapy; differences in miRNA signature in responders and poor responders before therapy indicate prognostic value. Mechanistic studies on altered miRNAs can provide new insights on disease.

 

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From the Discussion

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Ketamine is also considered to be the prototype for a new generation of glutamate- based antidepressants that can alleviate depression within hours of treatment. Several biological measures have been explored to characterize treatment response and to gain insight into mechanisms underlying the rapid antidepressant effects of ketamine. A plasma metabolomics study in patients with bipolar depression suggested that the basal mitochondrial b-oxidation of fatty acids differed between responders and nonresponders to ketamine. Other studies have shown differences in baseline plasma concentrations of D-serine, serum levels of interleukin 6, and plasma levels of Shank3, a postsynaptic density protein involved in NMDA receptor tethering and dendritic spine rearrangement.

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Differences in the ability to metabolize ketamine because of interindividual differences and pharmacogenetic factors have been proposed to contribute to the varied responses to ketamine therapy and its clinical outcome. Similar conclusions have been drawn for patients with depression; plasma from patients with treatment- resistant bipolar depression who had undergone a single 40-minute infusion of a subanesthetic dose of ketamine showed that although NK is an initial metabolite, it is not the major circulating metabolite. This again suggests that other downstream metabolites of ketamine may play a role in the pharmacological effects of the drug. It is also known that (2S,6S)-hydroxynorketamine is an active and selective inhibitor of the a7 subtype of the nicotinic acetylcholine receptor; this activity was shown to contribute to the pharmacological responses associated with the antidepressant activity of (R,S)-ketamine. We postulate that in patients with CRPS, 1 factor contributing to resistance is an altered pharmacokinetic profile produced by enhanced elimination of active metabolites downstream of NK, which is mediated by hsa-miR-548d-5p. However, because we have relied on indirect evidence of a higher percentage of direct/indirect bilirubin in poor responders, indicating increased UDP-GT enzyme activity, additional studies investigating hydroxynorketamine and its downstream metabolites along with their glucuronide conjugates in plasma and urine will provide direct evidence for the role of miR-548d-5p in mediating response to ketamine therapy in responders and poor responders.

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They noted a significant difference in body weight between responders and nonresponders (heavier), but not in duration of disease and analgesic response to ketamine. Toward that end, they will publish separately upon

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… investigating the link between miR-34a, which showed 28-fold reduction in poor responders relative to responders (Table 2), and the neuroendocrine system….

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From the Conclusion

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Our studies showed that miR-548d-5p can regulate UDP-GT but not CYP3A4, suggesting that UDP-GT activity in responders and poor responders may be mediated by differences in the level of circulating miR-548d-5p. Lower levels of miR-548d-5p in poor responders before treatment could result in higher UDP-GT activity, leading to the production of more inactive glucuronide conjugates and faster elimination of active ketamine metabolites downstream of NK. Thus, the levels of hsa-miR-548d-5p could minimize the therapeutic efficacy of ketamine and pain relief. Differences in miRNA signature can thus provide molecular insights distinguishing responders from poor responders. High failure rates of drugs targeted to treat neuropathic pain warrant changes in approaches. Studies targeting well-defined patient populations for clinical trials will play a crucial in developing drugs that may be efficacious in a subset of patients. Extending this approach to other treatment and outcome assessments might permit stratification of patients for maximal therapeutic outcome.

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How frustrating it is for patients and family who must cope with an intractable condition such as pain or Bipolar Disorder or treatment resistant Major Depression that has failed all commonly prescribed medications. For all of them, we need changes in approach.

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“High failure rates of drugs targeted

to treat neuropathic pain

warrant changes in approaches.”

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Perhaps scientists reading this would comment upon how it may relate to tolerance as it differentially occurs in those receiving intermittent ketamine vs continuous intravenous infusion.

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Dysregulation of miRNA’s has been shown in psychiatric disorders including depression and schozophrenia, neurodevelopmental disorders, cognitive dysfunction,  epilepsy, chronic pain states with implication for the cause and treatment of these disorders.

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Research targeting miRNA’s as novel treatment for depression has shown that chronic fluoxetine, repeated electroconvulsive shock therapy, and acute ketamine have the capacity to alter hippocampal miRNA levels.

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It is hoped these tests may be available someday clinically as the cost of off-label treatment not covered by insurance is a great burden for those already disabled by intractable pain or treatment resistant depression.

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PUBLIC WARNING

warning reprinted with permission of Demitri Papolos, MD
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Ketamine is a controlled substance.
Administered improperly, or without the guidance of a qualified doctor,
Ketamine may cause injury or death.
No attempt should be made to use Ketamine
in the absence of counsel from a qualified doctor.

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The material on this site is for informational purposes only.
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It is not legal for me to provide medical advice without an examination.

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It is not a substitute for medical advice, diagnosis or treatment provided by a qualified health care provider.

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This site is not for email and not for appointments.

If you wish an appointment, please telephone the office to schedule.

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For My Home Page, click here:  Welcome to my Weblog on Pain Management!

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Please ignore the ads below. They are not from me.

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Ketamine – small doses work in depression and bipolar disorder


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Everyone is very edgy right now with depression. Media is sensationalizing, which is the worst thing to do. I even hesitate to write this now.

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Ketamine really does work

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Small doses may be all that’s needed. Even large doses are safe.

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Two Cases

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I hate to play on emotion that is strong right now, but Robin Williams might be alive today if his doctors prescribed ketamine nasal spray.

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Every one, doctors and patients alike, worry about ketamine. It sells newspaper headlines and distorted media coverage that then overtakes the life saving stories of its profound safety when used under good medical supervision. Experience helps.

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Two cases from yesterday and today really must be shared. These two patients would not be alive today if they did not have ketamine nasal spray for their depression.

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I don’t mean to say every one will respond to these extremely tiny doses, but it’s always exciting to hear the effective dose is simply so small.

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These details would make good case reports if time permitted, but there is never enough time. I wanted simply to say a few things now because these two patients were seen.

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**1**

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In May 2014, saw a fifty-ish woman who is now responding to 20 mg (4 nasal sprays) given as one dose every 48 hours. She has been treated at well known university psychiatry departments, failed ECT 9 or 10 times – memory loss was so bad she got lost in her own neighborhood. Received IV ketamine once or twice weekly for one year before I saw her.

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Diagnoses:  dysthymia as long as she can remember, and 25 years of Major Depressive Disorder, PTSD, anxiety, etc. Olympic level athlete —

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**2**

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Second patient now in late teens, Juvenile Bipolar Disorder/Fear of Harm phenotype, profound thermoregulatory changes respond in seconds to ketamine, dose of 10 mg nasal spray every 3 days. That’s it! Temperature responds in seconds, and the depression responds in 10 minutes in her case. She was so violent before treatment that she had been hospitalized 7 times in 2-1/2 years. Doing very very well. And the low dose naltrexone, by the way, is involved in thermoregulation.

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I should mention, no side effects whatsoever. I have never seen toxicity. I watch kidney and bladder function meticulously, and patients with massive pain on very high doses have never had any organ toxicity.

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NEURO-INFLAMMATION AND GLIA – brain on fire.

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I mention Olympic athlete because so many people I see with Complex Regional Pain Syndrome – the pain that so often leads to suicide, seems to occur more often in top level athletes, either state or national level, professional or sponsored in their teens. Yes, they occur in others, but there is a striking predominance in athletes for unknown reasons.

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Glia are triggered by trauma, then they become activated and produce pro-inflammatory cytokines. Inflammation is out of balance. Ketamine profoundly reduces the pro-inflammatory cytokines, and so does low dose naltrexone. I write about these mechanisms with more frequency that anything else. This is what we must address – the brain is essentially “on fire.” And this inflammation, these pro-inflammatory cytokines, are involved in almost every known disease: Alzheimer’s disease, Parkinson’s disease, ALS, chronic pain, major depressive disorder, cancer, autoimmune disease, and atheroscloerosis.

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Inflammation kills. Unfortunately this new research on glia and inflammatory diseases, these diseases could be called gliopathies, all based on new research since the turn of the century. We now know glia are your innate immune system in brain and spinal cord. They need a balance the anti-inflammatory cytokines with the pro-inflammatory cytokines. Inflammation may be lifesaving when you have caught a virus, but not as a steady diet. Give the brain a break or it leads to hyperexcitable glutamate that triggers calcium flooding into the neuron, cell death, brain atrophy and memory loss. Seen in people with Major Depression and those with chronic low back pain.

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Do doctors know about the innate immune system? or the receptor that won the Nobel Prize 2 and 1/2 years ago? or glia?

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Answer: no.

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Papolos et al have published Clinical experience using intranasal ketamine in the treatment of pediatric bipolar disorder/fear of harm phenotype

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Ketamine administration was associated with a substantial reduction in measures of mania, fear of harm and aggression. Significant improvement was observed in mood, anxiety and behavioral symptoms, attention/executive functions, insomnia, parasomnias and sleep inertia. Treatment was generally well-tolerated.

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Dr. Papolos’ video on treatment points out, ketamine nasal spray is off-label

for Bipolar Disorder. And I add, ketamine is off-label for pain and for major depression.

He posts this:

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PUBLIC WARNING

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Public Warning: Ketamine is a controlled substance.

Administered improperly, or without the guidance of a qualified doctor,

Ketamine may cause injury or death.

No attempt should be made to use Ketamine

in the absence of counsel from a qualified doctor.

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“Off label” means it is FDA approved for another purpose, but he prescribes it for Juvenile Bipolar Disorder. I would add that in qualified hands, ketamine is one of the safest medications we have in our formulary.

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More later, as time permits.

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PUBLIC WARNING

reprinted with permission of Demitri Papolos, MD
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Ketamine is a controlled substance.
Administered improperly, or without the guidance of a qualified doctor,
Ketamine may cause injury or death.
No attempt should be made to use Ketamine
in the absence of counsel from a qualified doctor..

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The material on this site is for informational purposes only.

It is not a substitute for medical advice,

diagnosis or treatment provided by a qualified health care provider.

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Please understand that it is not legal for me

to give medical advice without a consultation.

If you wish an appointment, please telephone my office.

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For My Home Page, click here:  Welcome to my Weblog on Pain Management!

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Ketamine Nasal Spray for Major Depression – The First Randomized Controlled Trial


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A Randomized Controlled Trial of Intranasal Ketamine in Major Depressive Disorder

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Psychiatrists from Mt. Sinai in New York this month have published the first randomized controlled trial of intranasal ketamine showing it is safe, well tolerated, and rapidly effective in treating symptoms of depression in persons with Major Depressive Disorder.

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This is a small study of 18 patients with treatment resistant depression showing a significant antidepressant effect occurred as early as 40 minutes in some. 44% responded after 24 hours compared to 6% placebo. Ketamine was significantly different from placebo at 40 minutes, 240 minutes, and 48 hours, but not separable from placebo at 72 hours or 7 days thought they were still better. And ketamine was significant at improving anxiety symptoms at 24 hours. There were no clinically significant changes in heart rate or blood pressure and all changes resolved in four hours. “No serious adverse events occurred.”

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“Intranasal ketamine was well tolerated with only very minimal increases in dissociation, psychosis-like symptoms or hemodynamic parameters.” They felt these very minimal behavioral side effects and insignificant changes in blood pressure and pulse were consistent with the lower blood levels of ketamine compared to the higher doses used in studies of IV ketamine. Bioavailability via intranasal route is reported to range from 25% to 50%.

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Their sample had an average of 4.1 ± 3.9 treatment failures, compared to 5.7 and 5.1 in previous studies – those required a minimum of 2 to 3 treatment failures to enroll. Other clinical characteristics did not differ including “duration of illness, length of current depressive episode, and history of ECT.” They allowed ongoing treatment of psychotropic medication.

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They chose a 50 mg dose based on a previous study and on the dose used in persons with a chronic pain disorder (Daniel Carr, et al 2004). It is a lower dose than the 0.5 mg/kg dosage commonly given intravenously. They point out one limitation of the study was the use of the single dose and a standardized protocol, which did not allow them to study optimal dosing. Future study is needed to address optimal dosing, relapse prevention and scheduling of treatment.

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The minimal side effects shown in their study correlates well with my experience. I find the effective dose of ketamine is idiosyncratic. That means it is unpredictable and specific only to that individual. Large males may need only the smallest dose, and tiny elderly females may require far higher doses. That may account for the higher response rate that I believe I am seeing, however, I have not tracked percentage of responders. I have not seen toxicity in years of prescribing either for intractable pain or treatment resistant depression. Importantly, in my opinion, relapse prevention must address not only different neurotransmitters but also neuroinflammation, pro-inflammatory cytokines.

 

 

 

 

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The material on this site is for informational purposes only.

It is not a substitute for medical advice, diagnosis or treatment provided by a qualified health care provider.

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For My Home Page, click here:  Welcome to my Weblog on Pain Management!

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