sharing is caring – AND WORKING

A few days ago I made the following posts and since then the number of page views on my blog as jumped substantially and I have notice a few more people are sharing my posts.

Liking vs Sharing on FACEBOOK

I guess this means that I/we are getting more people “educated” on what is going on good (Robt Rose’s lawsuit) and the bad (suffering and suicides) in/around the chronic pain community.

I don’t make a penny off a page view, in fact… I may have to pay my ISP a few more $$$ per month to add RAM to the buffer on my blog to handle the increased internet traffic… NO BIG DEAL… if we educate more in what those in the chronic pain are dealing with and get more chronic painers to ADVOCATE.

cost of chronic pain to American society, based upon health care expenditures and cost of lost productivity, is $560-635 billion/year

Response to Oregon’s Tapering Guidance and Tools

www.paindr.com/%ef%bb%bfresponse-to-oregons-tapering-guidance-and-tools/

We welcome guest blogger Dr. Stephen E. Nadeau, Senior Research Advisor, Alliance for the Treatment of Intractable Pain. Dr. Nadeau agreed to share his response to The Oregon Pain Guidance Clinical Advisory Group, Tapering Workgroup*. For more context, the Advisory group recently posted a set of guidelines for tapering opioid doses in patients with chronic nonmalignant pain who have been receiving long-term treatment with opioid analgesics. These recommendations were specifically designed to be utilized by clinicians throughout the state of Oregon and are available HERE. Of note, opioid tapering or abrupt cessation of opioids was covered on paindr.com in a previous post, If you are forced to stop opioids.

*The Workgroup and contributors include Jane Ballantyne, Roger Chou, Paul Coelho, Ruben Halperin, Andrew Kolodny, Anna Lembke, Jim Shames, Mark Stephens, and David Tauben.

Thank you, Dr. Nadeau, for your patient advocacy and response letter as it appears below.
_____________________________________________________________________________

Ballantyne and colleagues, in their recent article, “Tapering – Guidance and Tools” (https://www.oregonpainguidance.org/guideline/tapering/), make the implicit assumption that tapering of opioid regimens in patients with chronic nonmalignant pain is a desirable thing – this, despite the evidence that the cost of chronic pain to American society, based upon health care expenditures and cost of lost productivity, is $560-635 billion/year (1); the evidence from randomized controlled trials employing designs that replicate good clinical practice that opioids are highly effective in the treatment of nonmalignant pain (2-6); the evidence that this beneficial effect can be sustained for years (7-9); and the evidence that the annual case fatality rate associated with chronic opioid treatment of pain is 0.08% with dosage of <200 mg morphine equivalent/day (MMED) (10), 0.25%/year with dosage of >100 MMED (11), and 0.5%/year with dosage >400 MMED (10). The latter two case-fatality rates are quite comparable to the risks of fatal bleeding associated with use of rivaroxaban (0.2%/year) and warfarin (0.5%/year) in the prophylaxis of stroke due to atrial fibrillation (12). Given the extreme impact of chronic pain on a patient’s life, this small risk is likely to be acceptable to nearly all. Ballantyne et al. state “it is widely recognized that prolonged continuous high dose opioid pain treatment is neither effective nor safe for the majority of patients.” “Widely misperceived” would be more accurate, as these claims are not supported by scientific evidence.

The authors also seem to suggest that, because the CDC recommended an upper limit of 90 MMED (13), doses above this level must be fraught with unacceptable risk. This CDC recommendation ignores the case-fatality data presented above and it further makes the assumption that “one dose fits all.” Data from randomized controlled trials that have adequately titrated opioid dosage suggest 13-fold variability in dose requirements (2, 4), variability that can be attributed to differences in pain intensity, genetic differences in hepatic metabolism (14), and genetic differences in central nervous system nociceptive signal transduction (15).

The authors seem to further justify their tapering recommendations with the statement that “overdose rates continue to be high compared to historical standard.” No question, but it is critical to ask, “Why is this?” Despite draconian reductions in prescription opioid dosage, mortality from prescription opioids has remained static at about 17,000/year since 2012. However, deaths from illicit opioids, overwhelmingly heroin and illicit fentanyl in variable combinations, have risen from 7,000 in 2011 to approximately 30,000 in 2017 (CDC data). Richard Lawhern, PhD, has shown, using state by state data on CDC websites readily available to all, that the correlation between number of opioid prescriptions/100 persons and mortality rate is 0.05. The very idea that constraining prescription opioids in the clinic is somehow going to solve the still- growing crisis in the streets begs credulity.

I welcome the authors’ emphasis on balancing the risks of opioid treatment of chronic pain against its benefits.  However, a judicious weighing of this balance must also take into account the overwhelming impact of chronic, inadequately-controlled pain on people’s lives. This reality must be fully appreciated, along with inter-individual variability in dose requirements, the modest risks of chronic opioid therapy, even in substantial dosage, and the patient’s vital input on the adequacy of pain control.

The most essential strategies for addressing the opioid overdose crisis and the CDC-manufactured chronic pain crisis are:

1) revise the CDC 2016 Guidelines so that they accurately reflect the scientific data;
2) release physicians to pursue unfettered good clinical practice in their management of patients in pain;
3) markedly enhance training of physicians in the management of chronic pain, including robust training in medical school and residencies and continuing education workshops (online courses will not suffice);
4) markedly increase the national resources dedicated to treatment of the opioid use disorder crisis in the streets (16).

As always, comments are welcomed with enthusiasm!

Stephen E. Nadeau, MD is a Professor of Neurology at the University of Florida College of Medicine and Associate Chief of Staff for Research at the Malcom Randall VA Medical Center in Gainesville, FL. He is a neurologist and a cognitive neuroscientist. He has devoted much of his clinical career since 1982 to the care of patients with chronic nonmalignant pain.

Disclaimer:
The contents of this manuscript do not represent the views of the United States Department of Veterans Affairs, the United States Government, or the University of Florida.

References

1. Institute of Medicine. Relieving
Pain in America: a Blueprint for Transforming Prevention, Care, Education, and
Research. Washington, DC: National Academies Press; 2011.

2. Hale ME, Ahdieh H, Ma T, Rauck
R, Oxymorphone ER Study Group 1. Efficacy and safety of OPANA ER (oxymorphone
extended release) for relief of moderate to severe low back pain in
opioid-experienced patients: a 12-week, randomized, double-blind,
placebo-controlled study. Journal of Pain. 2007;8:175-84.

3. Hale ME, Dvergsten C, Gimbel J.
Efficacy and safety of oxymorphone extended release in chronic low back pain:
results of a randomized, double-blind, placebo- and active-controlled phase III
study. Journal of Pain. 2005;6:21-8.

4. Katz N, Rauck R, Ahdieh H,
Gerritsen van der Hoop R, Kerwin R, Podolsky G. A 12-week, randomized,
placebo-controlled trial assessing the safety and efficacy of oxymorphone
extended release for opioid-naive patients with chronic low back pain. Current
Medical Research and Opinion. 2007;23:117-28.

5. Rauck RL, Nalamachu S, Wild JE,
Walker GW, Robinson CY, Davis CS, et al. Single-entity hydrocodone
extended-release capsules in opioid-tolerant subjects with moderate-to-severe
chronic low back pain: a randomized double-blind, placebo-controlled study.
Pain Medicine. 2014;15:975-85.

6. Katz N, Kopecky EA, O’Connor M,
Brown RH, Fleming AB. A phase 3, multicenter, randomized, double-blind,
placebo-controlled, safety, tolerability, and efficacy study of Xtampza ER in
patients with moderate-to-severe chronic low back pain. Pain. 2015;156:2458-67.

7. Milligan K, Lanteri-Minet M,
Borchert K, Helmers H, Donald R, Kress H-G, et al. Evaluation of long-term
efficacy and safety of transdermal fentanyl in the treatment of chronic
noncancer pain. Journal of Pain. 2001;2:197-204.

8. Mystakidou K, Parpa E, Tsilika
E, Mavromati A, Smyrniotis V, Georgaki S, et al. Long-term management of
noncancer pain with transdermal therapeutic system-fentanyl. Journal of Pain.
2003;4:298-306.

9. Roth SH, Fleischmann RM, Burch
FX, Dietz F, Bockow B, Rapoport RJ, et al. Around-the-clock, controlled-release
oxycodone therapy for osteoarthritis-related pain. Archives of Internal
Medicine. 2000;160:853-60.

10. Gomes T, Juurlink DN, Dhalla
IA, Mailis-Gagnon A, Paterson JM, Mamdani MM. Trends in opioid use and dosing
among socio-economically disadvantaged patients. Open Medicine. 2011;5:13-22.

11. Bohnert ASB, Valenstein M, Bair
MJ, Ganoczy D, McCarthy JF, Ilgen MA, et al. Association between opioid prescribing
patterns and opioid overdose-related deaths. Journal of the American Medical
Association. 2011;305:1315-21.

12. Patel MR, Mahaffey KW, Garg J,
Pan G, Singer DE, Hacke W, et al. Rivaroxaban versus warfarin in nonvalvular
atrial fibrillation. New England Journal of Medicine. 2011;365:883-91.

13. Dowell D, Haegerich T, Chou R. CDC Guideline
for prescribing opioids for chronic pain — United States, 2016. Morbidity and
Mortality Weekly Report. 2016;65:1-49.

14. Agarwal D, Udoji MA, Trescot A.
Genetic testing for opioid pain management. Pain Therapy. 2017;6:93-105.

15. Galvan A, Skorpen F, Klepstad
P, Knudsen A, Fladvad T, Falvella FS, et al. Multiple loci modulate opioid
therapy response for cancer pain. Clinical Cancer Research. 2011;17:4581-97.

16. Winkelman TNA, Chang VW,
Binswanger IA. Health, polysubstance use, and criminal justice involvement
among adults with varying levels of opioid use. JAMA Network Open. 2018. DOI:
10.1001/jamanetworkopen.2018.0558

17.
Richard A Lawhern, Ph.D. and John Alan Tucker, Ph.D. “Analysis of US Opioid
Mortality and ER Visit Data”, May 15, 2018, available at
http://face-facts.org/atip/analysis-of-cdc-wonder-rx-and-er-data-v1-4-may-2018-2/

Vet with terminal cancer.. bedridden… because of VA opiate dosing prgm

+

Local veteran struggles to get prescribed medication in light of drug epidemic

https://weartv.com/news/local/local-veteran-struggles-to-get-prescribed-medication-in-light-of-drug-epidemic-01-15-2019

The opioid epidemic is a major concern across the country and in Northwest Florida.

The national crisis recently caused the VA to update guidelines for healthcare professionals prescribing pain medication.

A local veteran, Donald Houghton, tells WEAR’s Chorus Nylander the changes have left him nearly bedridden.

“It takes all my energy just to live,” Houghton said.

He is a father, grandfather, great-grandfather and Air Force veteran, a lot to live for while suffering from terminal prostate cancer.

“I can’t do the things I know I can do,” Houghton said.

For the past 12 years, he said he’s relied on fentanyl, an opioid prescribed to him by the VA, to deal with the pain.

“When that pain breaks through, the sciatic pain, I can’t explain it to you,” Houghton said.

For the past year, he said the VA has begun tapering him off of the drug as a result of new guidelines in light of the opioid epidemic. A change his son, Everette Houghton, said has been devastating.

“It’s destroying him. He’s been hospitalized four of the last five months with heart failure and it’s probably tied to his drastic cut into his pain meds,” Everette said.

Everette is a Navy veteran himself.

He said as the opioid doses have been fading away, so has the strong active man he once knew.

“This is not my father,” he expressed.

He said his father had been under a prescription of 200 milligrams given over a three-day period. The dose has been reduced each month.

The VA guidelines recommend patients currently prescribed more than 90 milligrams get evaluated for tapering, reducing doses, or discontinuing the pain meds.

Houghton’s now on his final month before being rid of opioids all together. For his family – that is not a good thing.

“I just want him to have some relief for this pain, this shouldn’t be happening,” Everette explained.

WEAR spoke to Dustin O.T. Perry, an opioid specialist, at the Lakeview Center Clinic. He cannot speak on the Houghton case directly, but said opioid dependence is a growing concern.

“If you go to the doctor and take the prescribed amount over time, you will become dependent on the substance,” Perry explained.

He said each case is different and requires a medical consultation, but tapering off the drug typically shouldn’t lead to major complications.

“If you felt the person was in a safe place you would want to taper them down comfortably, and I think that would be up to the doctor and patient,” Perry said.

The Houghton family said Donald wasn’t given a choice in the matter, with little communication from his doctor.

“I’ve been to war, I’ve seen a lot of ugly things, but never anything like that. Seeing my own father like this,” Everette said.

We spoke with a representative from the VA Hospital out of Mississippi, who tells us they cannot comment on the Houghton case, but sent us the following statement:

VA is recognized by many as a leader in the pain management field for the responsible use of opioids across the VA health care system. For instance, in January the department became the first hospital system in the country to release its opioid prescribing rates.

Because some Veterans enrolled in the VA health care system suffer from high rates of chronic pain, VA initiated a multi-faceted approach called the Opioid Safety Initiative(OSI) to reduce the need for the use of opioids among America’s Veterans using VA health care.

Since its launch, the program has resulted in 308,911 fewer Veteran patients – a 45 percent reduction – receiving opioids from July of 2012 to June of 2018.

Abuse of chronic pain pts so that “needles jockeys” can generate more revenue ?

New organization fighting for the chronic pain community

Organization for the prevention of intense suffering

www.preventsuffering.org/pain/

Walmart Inc. pharmacies will no longer be part of the networks where most consumers with CVS Health Corp

Walmart Inc. pharmacies will no longer be part of the networks where most consumers with CVS Health Corp. drug plans can pick up their prescriptions, after a dispute between the two giant companies over pricing.

http://www.ncpanet.org/home/find-your-local-pharmacy

CVS is one of the largest administrators of prescription-drug plans in the U.S., covering more than 93 million people. While known mostly for its drugstores, CVS’s pharmacy-benefits management division, CVS Caremark, has come to account for most of its revenue. It administers drug coverage for many large employers as well as numerous Medicare and Medicaid beneficiaries.

Walmart, the world’s largest retailer, is also one of the largest pharmacy operators in the U.S. The company was demanding higher reimbursements from CVS for its pharmacies, CVS said in a statement announcing the split.

Walmart indicated it was resisting efforts by CVS to steer consumers to certain pharmacies to have their prescriptions filled. A company spokeswoman said in an emailed statement that the retailer was committed to giving customers access to affordable health care, “but we don’t want to give that value to the middle man.”

“This issue underscores the problems that can arise when a PBM can exert their unregulated power to direct members on where to fill their scripts, disrupting patients’ health care,” the statement said. “Walmart is standing up to CVS’s behaviors that are putting pressure on pharmacies and disrupting patient care.”

Amid a larger debate in the U.S. over drug prices, pharmacy-benefit managers like CVS have come in for criticism from consumers, lawmakers and regulators for a lack of transparency about prices and rebates they negotiate with drugmakers, as well as how the construct their formularies, or lists of covered medicines.

CVS said the rates Walmart was seeking would have led to patients paying more for their medicines.

“Walmart’s requested rates would ultimately result in higher costs for our clients and consumers,” CVS Caremark President Derica Rice said in the statement. “We simply could not agree to their recent demands for an increase in reimbursement.”

CVS shares were down 2.8 percent at 9:40 a.m. in New York. Shares of the company, which is merging with health insurer Aetna Inc., have declined about 24 percent since hitting a 52-week high in January 2018.

CVS is one of the U.S.’s biggest pharmacy chains, with almost 10,000 locations. Walmart dispenses drugs in about 4,700 locations, and has flirted with getting more involved in the health-care industry. It has looked at offering wellness services and other offerings that will become a key part of CVS’s business with its takeover of health insurer Aetna last year.

Walmart has been looking to expand its health business for years. It recently hired a former senior executive of insurer Humana Inc. to lead its health-care arm, leading to speculation that the companies could forge closer ties. Walmart and Humana have explored ways to deepen an existing health-care alliance, a person familiar with the matter said in March. The companies already work together on prescription plans for Medicare patients.

The split won’t affect Medicare beneficiaries in CVS’s Part D drug plans. It also won’t apply to Walmart’s Sam’s Club stores, CVS said in the statement. CVS said the move won’t materially impact its 2019 results.

News of the split was reported earlier by the Wall Street Journal.

Montana has become a wasteland for pain management

Dr. Mark Ibsen (IR Copy)

Montana has become a wasteland for pain management

https://helenair.com/opinion/columnists/montana-has-become-a-wasteland-for-pain-management/article_e567f3fa-a8dc-5f69-aa83-16d37394d496.html

Why would we be sycophants for the Attorney General, who misrepresents the facts for political gain, so he can claim a “victory” in a drug war (against people) that is 50 years old, costing $2 trillion?

AG Fox is featured in the Montana Medical Association bulletin this month, supporting added mandates for physicians and others who provide prescription medications. “Know your Dose” is a program right out of American Society of Interventional Pain Physicians, not scientifically based, and holds a prominent ad buy in the bulletin.

The surge in back pain in Montana is directly related to the surge in procedures.

Drs. Bender and Danaher testified under oath in Dr. Christensen’s trial, in order to take out their competition.

Dr. Christensen took on opiate refugees from Missoula Spine, as the plan, now successful, was to eliminate opiates, so as to enable more procedures. Did you know that epidural steroids are NOT approved by FDA? That ESIs can cause adhesive arachnoiditis, and Intractable Pain?

That .01 percent of patients metabolize opiates so rapidly that they require very large doses (similar to diabetics who require huge insulin doses)?

That Physicians for Responsible Opioid Prescribing, a group of addiction doctors, claim that opiates for pain are heroin pills, and never should be used, and they claim this without evidence?

There is another side to this whole story that has yet to be told, or is being told by doctors and patients who have been marginalized, and that includes myself. The Board Of Medicine took me out, in coordination with DEA. It worked.

But the DEA, regulators and legislators are practicing medicine without a license, always mindful of: “we cannot tell you what to do, we are not doctors.”

It is well known that the board of medicine deprived me of my due process rights, had “experts” that were found to be lying (not credible) and ignored the findings of their own hearing officer, David Scrimm. The intimidation of doctors in this state has worked. It worked on me.

The consequences, intended or not, are that Montana has been turned into a wasteland for pain management. We have become a Third World state, with people in such misery that they kill themselves.

Let’s have an open debate about the terror that doctors have been feeling.

Let’s look at the tribalism and shaming happening around pain and addiction.

Let’s interview patients who were taken from their familiar primary care MD, and forced to see a mid level NP or PA, who took them off their stable regimen.

It’s nasty.

Follow the money. 

But remember FEAR: false evidence appearing real.

In a letter to the Statesman Journal, Dr. Darryl George wrote: “I have seen providers misread drug tests and dismiss patients with rapid or no tapers. They fail to do confirmation testing to ensure the office test is accurate. They look for any excuse to fire the patient. Many of these patients will become unable to work, become less functional at home, and personal relationships become strained. Some patients end up divorced or contemplate suicide when their pain is uncontrolled.

The “ugly” happens when federal and state agencies blame the opioid epidemic on providers and patients.”

The facts are coming out. Montana leads the nation in suicides. Pain mismanagement and malfeasance have created a hostile regulatory environment for doctors.

I’m a member of The Montana Medical Association.

MMA could start standing up for patients who have been abandoned and physicians who try to help them.

Of course, the message and messengers were not welcomed.

Truth will come out.

Where will we be standing when it does?

Mark Ibsen, MD, is the former owner of Urgent Care Plus in Helena. 

 

The lawsuits on cpp’s behalf are being filed!

The lawsuits on cpp’s behalf are being filed! The cost to add your name to the suit is a postage stamp!! We need numbers! You are encouraged to cross-file with other states that have a file# even though you do not live in that state. Steve Ariens, if you could kindly share this information. Unity is “key”. Thank-you sir. More states will be filing as the days go by.

If you are a chronic pain patient and you are losing life-saving medications and would like to join the lawsuit…here you go! Ok friends, I’ve heard back from Robert regarding how to join the lawsuit. The instructions are as follows:

Go to sickofsuffering.com
Click on Find Out More, then
Click on Motion to Join.
The states are represented by their state’s flag 🇺🇸
Follow the instructions on the page
Fill out the paperwork
Please join ALL states, so that we can get to the forty people needed for a class action lawsuit.
Drop the finalized paperwork in the mail.

We do not have to go to any courthouses to join any of the lawsuits. It’s that simple. No money is necessary.

If you have any questions, let me know! I will find the help you need!

Thanks to everyone, and please remember to try to spread the word to all of the other states that have yet to file. If we get to 34 states filing, the law is automatically overturned. That’s our ultimate goal.

Why California pharmacies are rejecting some prescriptions for pain medications

Why California pharmacies are rejecting some prescriptions for pain medications

https://www.sacbee.com/news/local/health-and-medicine/article224524420.html

Doctors around California are complaining that the state did not send them notice of a Jan. 1 change in prescription forms and that pharmacies are rejecting prescriptions for controlled substances on forms they used just last year.

Dr. Richard Buss, a family practice physician in Jackson, said this is the second year the state made changes to prescription requirements without notifying doctors directly. He said he was unaware of the change until Jan. 2 when a pharmacy told him it wouldn’t fill a prescription. He was unable to get new prescription forms that meet state requirements until Monday.

“Nobody told the doctors about it — until like now — when the change is required,” Buss said. “Pharmacies are already refusing to accept our prescriptions for controlled substances. One of the doctors at our hospital is trying to send a patient home who just had knee surgery, and he can’t get pain medication ordered for her because these (prescription forms) became out of date at the end of the year.”

The California Medical Association has been hearing from physicians up and down the state about this issue, said Anthony York, a spokesperson for the organization, and CMA is working with the Medical Board of California, the California State Board of Pharmacy and the California Department of Justice to ensure that providers can serve their patients effectively.

Assembly Bill 1753, sponsored by Assemblyman Evan Low, D-Silicon Valley, went into effect on Jan. 1. It limits the number of printers authorized to produce prescription pads for controlled substances and requires the forms have tamper-proof measures to make them easier to track and harder to use if stolen. The measures were intended, Low said, to help stem the opioid crisis.

On Monday, Low issued a statement acknowledging there have been some problems with how the law is being implemented. In the statement, he said he has communicated his “grave concerns” in a letter to the Department of Justice, and is “committed to seeing that any legislative solution is signed into law immediately.”

The Medical Board of California issued a memo Dec. 28 to physician prescribers, alerting them to the change. But that was too late, according to the board, which said on its web site that it still received a number of inquiries from providers complaining that their prescriptions were being rejected.

The Medical Board memo quotes the enforcement committee at the California Board of Pharmacy saying it will “not make any action or investigation a priority” against a pharmacist who believes it’s in the best interest of public health to fill a prescription with the old form and does so. Pharmacists also could ask for an electronic prescription or seek an oral prescription if laws allow that for the specified drug.

Buss, who has been practicing since 1987, said that old prescription forms will work for blood pressure medications or penicillin, but they are being declined for controlled substances such as pain medications containing opioids.

“This is an example of total bureaucratic and legislative bumbling, to not be able to make arrangements for a transition,” Buss said.

Lisa Folberg, the chief executive officer of the California Academy of Family Physicians, said her organization has not yet fielded calls from providers on this issue. The CAFP included an article on the subject in its Jan. 8 publication for members.

Clinical info available YEARS before CDC guidelines and apparently IGNORED by them .. because they had an agenda ?

Need for High Opioid Dose Linked to CYP450

https://www.medscape.com/viewarticle/771480

September 25, 2012 (Phoenix, Arizona) — Patients with chronic pain who require high doses of opioids to achieve pain relief show exceptionally high rates of defects of the cytochrome P450 (CYP450) enzyme system compared with the general population.

The CYP450 enzyme system is known to play an important role in the metabolism of opioids, and recent advances in genetic testing allow for the easy detection of defects to the enzymes.

“We’ve known for years that among patients with the exact same pain conditions one may need 500 mg of morphine a day while the other may need only 50 mg, but we’ve always wondered why,” lead author Forest Tennant, MD, told Medscape Medical News.

“It turns out that among high-dose patients, about 85% have these defects in 1 or more of their CYP450 enzymes.” In the general population, only about 20% to 30% of people have CYP450 defects, he said.

His findings were presented here at the American Academy of Pain Management (AAPM) 23rd Annual Clinical Meeting.

Emerging Frontier

To evaluate patterns among his own patients with intractable pain, Dr. Tennant tested 66 patients attending his clinic in West Covina, California, who required more than 150 mg equivalence of morphine a day for pain relief.

The patients were tested specifically for the CYP2D6, CYP2C9, and CYP2C19 enzymes. The results showed that 55 (83.3%) of the 66 patients had 1 or more CYP450 defects, 21 (31.8%) had 2 defects, and 6 (9.1%) had 3 defects.

According to chronic pain management expert Gary M. Reisfield, MD, genetic research is poised to reveal expansive new insights into the mechanisms of why some patients respond to medications whereas others don’t.

“Pharmacogenomics represents the emerging frontier for understanding interindividual variability in opioid efficacy and toxicity, and in guiding safe and effective opioid pharmacotherapy,” said Dr. Reisfield, an assistant professor and chief of Pain Management Services in the University of Florida College of Medicine’s Divisions of Addiction Medicine and Forensic Psychiatry and Department of Psychiatry in Gainesville, Florida.

“With regard to opioid response, the mu-opioid receptor, the ATP [adenosine triphosphate]-binding cassette subfamily B, and other genes are believed to play significant roles,” he explained.

With CYP450, a “superfamily” of enzymes responsible for the metabolism of most opioids, various polymorphisms and variables in activity can have clinical significance.

The enzymes, for instance, have been implicated as playing a role in the overactive metabolism of codeine. In a recent case, the US Food and Drug Administration (FDA) in fact issued a warning about the risks associated with codeine after 3 children died and a fourth child nearly died after having been administered codeine following tonsillectomy and adenoidectomy.

“Once in the body, codeine is converted to morphine in the liver by an enzyme called cytochrome P450 isoenzyme 2D6 (CYP2D6) (and) some people metabolize codeine much faster and more completely than others,” the FDA wrote in a statement.

“These people, known as ultra-rapid metabolizers, are likely to have higher-than-normal levels of morphine in their blood after taking codeine. These high levels can lead to overdose and death,” the agency said. “The three children who died after taking codeine exhibited evidence of being ultra-rapid metabolizers.”

Conversely, some people are “poor” metabolizers of codeine, meaning that they have few, one, or no copies of the gene or CYP2D6, Dr. Reisfield added.

“Such individuals are incapable of metabolizing codeine morphine, and thus incapable of deriving analgesia from administration of the medication.  Both genetic defects would be detected through CYP2D6 genotyping.”

Drug Seeker or Higher Requirement?

That being said, Dr. Reisfield suggested that the new study’s findings, although intriguing, leave many unanswered questions.

“The study adds to a nascent literature on pharmacogenomics in opioid therapy,” Dr. Reisfield said. “Dr. Tennant demonstrates an association between CYP ‘defects’ and requirements for high opioid dosages. He has not, however, established a causal association.”

The study’s limitations include that “the most frequent defects were in CYP2C19, which plays an inconsequential role in methadone metabolism, but plays no role in the metabolism of other opioids,” Dr. Reisfield said.

Meanwhile, CYP3A4, an important enzyme for the metabolism of most opioids, was not genotyped in the study, Dr. Reisfield said.

In addition, the specific opioids used were not identified, which is important because some opioids, including hydromorphone, oxymorphone, and morphine, are not metabolized by CYPs, he added.

It’s not known whether subjects were receiving other medications that could have affected CYP metabolic activity.

Dr. Tennant acknowledged that the study would have benefited from more information from a control group of patients with chronic pain who did not require the high doses.

No one should be called a drug-seeker these days until you’ve done the CYP450 testing.

“It is unknown just how prevalent severe intractable pain patients with CYP 450 defects who require high dose opioid therapy may be compared to the general, chronic pain population, but it is probably a small percentage,” he wrote.

“This study makes it clear, however, that some severe chronic pain patients have major CYP defects that affect opioid metabolism and dosage.”

At the very least, the findings suggest that CYP450 testing can represent an important starting point for evaluation when high doses of opioids are required, Dr. Tennant asserted.

“No one should be called a drug-seeker these days until you’ve done the CYP450 testing to see if that patient simply needs an awful lot more medication than someone else.”

Dr. Tennant and Dr. Reisfield have disclosed no relevant financial relationships.

American Academy of Pain Management (AAPM) 23rd Annual Clinical Meeting. Abstract 5. Presented September 21, 2012.