Antioxidants

October 2, 2009

For the top ten antioxidants for kidney health, see my article on empowher.com.

Here are the References from the medical literature:

 Chade AR et al, “Beneficial effects of antioxidant vitamins on the stenotic kidney”, Hypertension 2003; 42:605-612.

Bertelli AA et al, “Resveratrol, a component of wine and grapes, in the prevention of kidney disease”, Ann N Y Acad Sci 2002 May; 957:230-8.

Bao L, “Protective effect of bilberry (Vaccinium myrtillus L) extract on KBrO3-induced kidney damage in mice”, J Agric Food Chem 2008 Jan 23; 56(2):420-5.

Renno WM et al, “Effect of green tea on kidney tubules of diabetic rats”, Br J Nutr 2008 Sep; 100(3):652-9.

Saad AA et al, “Cisplatin induced damage in kidney genomic DNA and nephrotoxicity in male rats: the protective effect of grape seed proanthocyanidin extract”, Food Chem Toxicol 2009 Jul; 47(7):1499-506.

Odetti P et al, “Comparative trial of N-acetyl-cysteine, taurine, and oxerutin on skin and kidney damage in long-term experimental diabetes”, Diabetes 2003 Feb; 52(2):499-505.

Fujii T et al, “Dietary supplementation of L-carnosine prevents ischemia/reperfusion-induced renal injury in rats”, Biol Pharm Bull 2005; 28(2): 361-363. 

Turgut F et al, “Antioxidant and protective effects of silymarin on ischemia and reperfusion injury in the kidney tissues of rats”, Int Urol Nephrol 2008; 40(2):453-60.

Bhatti F et al, “Mechanisms of antioxidant and pro-oxidant effects of alpha-lipoic acid in the diabetic and nondiabetic kidney”, Kidney Int 2005 Apr; 67(4):1371-80.

Polycystic Kidney Disease

September 22, 2009

I wrote an article about polycystic kidney disease for EmpowHer.com. See

http://www.empowher.com/news/herarticle/2009/09/21/polycystic-kidney-disease-review-cleveland-clinic

Probiotic Vaginal Suppositories

August 13, 2009

I wrote an article about probiotic vaginal suppositories for the EmpowHer.com women’s health web site. Here’s a link:

http://www.empowher.com/news/herarticle/2009/08/12/probiotic-vaginal-suppositories

Paying for Health Care Reform

July 15, 2009

(This was published as a Letter to the Editor in the Austin American-Statesman on July 22, 2009.)

Paying for health care reform is the easiest part. We have about 40,000 uninsured people who can pay premiums if they have a decent group plan available.

Insurance works on numbers. Large companies have big enough groups to negotiate a deal on health insurance for their employees. But small businesses and start-ups, which are major sources of jobs and innovation, don’t have the numbers they need for efficient group coverage.

I think everyone who is not qualified for Medicare or Medicaid should be able to pay premiums to buy into Medicare. It is not necessary for the taxpayers to pay for this coverage; just give people under 65 the opportunity to buy health insurance in a large group. Medicare covers what the majority of voters demand.

And where does that leave private insurance companies? They should be offering competitive options. Some customers may want coverage for experimental treatments, alternative medicine, dental and vision care, nursing home care, cosmetic procedures, weight management programs, etc. Here’s one option I would like to have: I want treatment discontinued if I become brain dead. I would pay extra for an insurance policy that lets me choose (in advance) when to cut off payment.

Competition improves the product. Let’s give everyone access to Medicare or an equivalent government plan, and the insurance companies can then compete for our business.

Health Care Reform: What’s in it for us?

June 18, 2009

My ex-husband Dave did some consulting for a small company working on software for doctors to keep up with managed health care insurance contracts. Dave came home and said “We already have socialized medicine! But instead of one system, we have 40 different ones!” He explained that health insurance companies dictate what treatment we get and how much they pay for it. And most of us have no choice about what health insurance plan we get – employers generally offer one plan, take it or leave it. Individual health insurance can be a nightmare. If you’re over 30 and have pre-existing conditions, such as a body, you may have to pay outrageous prices to get any coverage.
With Medicare, the voters decide what gets covered and what choices we have. Any government plan has the advantage that if we don’t like it, we can make Congress change it! For private health insurance, we’re stuck with what a few ridiculously high paid executives decide for us.

Sometimes competition improves the product. If you have a choice of buying a car from General Motors, Ford, Toyota, Honda, etc., you can expect each company to do their best to get your business. Some companies perform better than others and make more profits (as we have seen!). If you have a choice of health care insurance plans, you can also expect the insurance companies to compete with each other to give you a good deal. But that’s not how it works for health insurance. It’s been a long time since I heard anyone tell me they like their health insurance. But what are you going to do? If you have an employer-sponsored plan, you can’t take your money elsewhere.

When I worked in Germany, my colleagues had a choice of their government-sponsored health insurance or private insurance. Everyone who had a job got premiums for the government health insurance deducted from their pay, unless they showed proof of private insurance. All the Germans I met were happy with their choices. When a German couple came to visit the group I worked with here in Texas, they were appalled at what they saw. The wife was on dialysis, so she made arrangements to get treatment in American hospitals on the trip. There she saw waiting rooms full of people in line for hours to get emergency care. In Germany, she told me, hospitals take care of sick people.

We’ve already made the political decision that everyone has a right to some level of health care. Hospitals have to provide service for indigent people. And for a major health crisis, anything from car wreck to cancer, almost anyone without health insurance is indigent. So to be fair and efficient, we should require everyone above the poverty level to pay for health insurance. This is the way it works with car insurance: you have to buy insurance before you can register your car. When everyone shares the cost fairly, health care is less of a financial burden to middle class people who pay both premiums and taxes.

Preventive maintenance is cost-effective for cars, and preventive health care is cost effective for people. The one good thing I see in the managed health care experiment is the idea that insurance should pay for preventive care. It costs less to treat health problems before they reach emergency room status. If everyone is covered by some health insurance plan, public or private, there will be a much higher percentage of the population receiving preventive care. This saves money overall.

For health care cost containment, the most important factor is what we’re getting for the money. Most of us know at least one horror story of someone who endured a miserable and expensive course of treatment only to find out it was worthless. The way to stop this waste is for all of us to be better informed consumers. We’re supposed to give informed consent for any treatment. We should have enough information to make intelligent decisions about health care, as much as we can make intelligent decisions about buying a car, or a house, or any other product. For this, the Internet is a valuable tool. Everyone has access to abstracts of medical journals in the National Library of Medicine. To search the literature, go to http://www.ncbi.nlm.nih.gov/sites/entrez?db=pubmed. Other popular sites include webmd.com, mayoclinic.com, and EmpowHer.com.

I’m doing my part by writing about health care. You can read more of my articles below, and at the following links:

 

http://www.empowher.com/news/herarticle/2009/05/11/cholesterol-how-high-too-high

http://www.empowher.com/news/herarticle/2009/05/12/depression-during-pregnancy-omega-3-study

http://www.empowher.com/news/herarticle/2009/06/10/embryonic-stem-cell-research-amyotrophic-lateral-sclerosis-als

http://www.empowher.com/news/herarticle/2009/06/12/multiple-sclerosis-women

http://www.empowher.com/news/herarticle/2009/06/11/iatrogenic-coma-always-double-check-your-doctor

 

Linda Fugate, Ph.D.

 

 

 

Guinea Pig’s Report

June 14, 2009

I’m a scientist as well as a guinea pig, so I usually focus on the technical details of psychotropic drug dependency and withdrawal. But I recognize that the human issues are just as important.

I’ll call my third psychiatrist Dr. Smith. On my first visit, he said, “I will find something that makes you feel better.” I was astounded to hear such a commitment. Later he assured me, “Don’t worry, it’s very safe; it’s a low dose.” “There are no side effects! We don’t have to check any lab tests.” And most ominous: “I promise I won’t get you addicted on 10 mg of Valium per day”.

All I did was get divorced. I was not a homicidal maniac wreaking havoc on the public. And I resisted the urging of my family and friends to go get a prescription for antidepressants. I said no, it doesn’t help to take drugs when you’re normal, and it’s normal to feel depressed about losing someone you love. But they persisted. They told me I had to do everything I could to help myself before anyone else would help me.

The loneliness was agonizing. So I relented and saw a doctor. This turned into a saga of four doctors and ten drugs. Most of the drugs had side effects so awful that I refused to take them for more than a few days: Prozac, Paxil, Wellbutrin, and Effexor. I persisted for a few months with Serzone and a few weeks with Zoloft, chasing the promise that I would feel better if I put up with the flu-like symptoms long enough.

I have a Ph.D. in Physics and a master’s degree in Macromolecular Science, so I avidly read the theories of neurotransmitter deficiency. Dr. Smith responded with enthusiasm to my interest in pharmacological technology. I felt that he genuinely cared about me. And the breakthrough in my treatment came in a 5:30 pm appointment when he re-diagnosed me as Bipolar Type 2. I was receptive to the diagnosis because he was working late, and he related the diagnosis to my creative abilities.

He then prescribed lithium, and I felt remarkably better within 2 days. I think now that it just anesthetized me from the effects of the other drugs. I stayed on it a few months and felt “comfortably numb”, to quote from the song, until my thyroid function went down.

Then the big experiment began. Dr. Smith gave me a starter kit for Lamictal, with little pills to take for four weeks. I took it home and just looked at it. Another four weeks of nausea, fatigue, and overall misery? No, I couldn’t do it. I went back the next week and explained that I couldn’t stand another round of starting up a new drug. He said oh no, Lamictal is different. “It doesn’t make you sick.” He insisted the small pills were just a precaution against Stevens-Johnson syndrome, a life-threatening skin condition that starts with a mild rash. If any rash develops on the small pills, Lamictal must be discontinued. Otherwise, he assured me, Lamictal is perfectly benign.

The FDA files tell a different story. Long after that fateful appointment with Dr. Smith, I requested the reports of adverse events following Lamictal treatment, under the Freedom of Information Act. The FDA sent me a computer CD with 15,426 complaints. The cost was $61. Anyone can get the reports on any drug, following the information on the FDA web site at http://www.fda.gov/opacom/backgrounders/foiahand.html.

Over the seven years I took Lamictal, the most obvious side effect was muscle tension and pain. But I didn’t realize it came from the drug. I have a neck injury from gymnastics in college, and I thought I was just getting worse with age. Dr. Smith always encouraged me to get plenty of exercise. Shortly after getting on Lamictal, I complained that my muscles “seized up” whenever I did enough exercise to get even mildly sore. My massage therapists complained too. They said my muscles felt like concrete. Dr. Smith prescribed Valium as a muscle relaxant, with great assurances that 10 mg per day was too low to cause any harm.

I think most people like to do what they know how to do. Dr. Smith knows how to write prescriptions, and he had the perfect set-up with me. He prescribed Valium to treat the side effects of Lamictal. And the Valium caused a visceral feeling of depression, which convinced me that I never fully recovered from my divorce. So in practical terms, he wrote prescriptions for Lamictal to treat the side effects of Valium.

I enjoyed those 15-minute visits with Dr. Smith once every three months. He was intelligent and upbeat. I could answer his checklist in 30 seconds: appetite, sleep, exercise, social activities, writing. Yes, they were all fine. Then I had 14 and a half minutes to talk to a doctor about anything else that came to mind: foot care, bird flu, or the philosophical theory of consciousness. He gave me more attention than any other doctor up to that time. So I trusted him.

I assumed Valium wore off in about four hours, like typical over-the-counter drugs. For about 4 years, I usually took one (5 mg) pill at night, hoping that my muscles would get a nice rest while I slept. I thought I was free of Valium during the day. Much later, I found out Valium and its active metabolite have a half-life of about a week in the blood stream. So all that time, I was constantly and unknowingly drugged on a controlled substance.

My fifth year of Valium was the revelation. I started an ambitious self-improvement program of exercise and psychotherapy. To deal with the sore muscles, I increased my Valium consumption to the full prescription dose of 10 mg. During this year, I always took the pills at bedtime. They seemed to help my muscle tension at first, but I never escaped the neck pain. And I sank into depression. I diligently followed my therapist’s advice to develop new interests, activities, and friends. And I felt worse and worse. I complained to Dr. Smith, and he told me I needed more drugs. Familiar story, right? For a while I took lithium in addition to the Lamictal and Valium.

Then I decided that the neck pain was wearing me down enough to impede my progress in psychotherapy. So I looked in the phone book and chose a pain management clinic near my home. On the first visit, my new doctor showed me the bone fragments on my neck x-rays, which were taken two years earlier. The radiologist called them “unremarkable”, and my primary care physician failed to diagnose anything wrong. That’s another long story in itself.

The pain management doctor diagnosed me with nerve irritation, and proposed a series of procedures. He explained that he doesn’t recommend Valium for this type of pain, because even though it does relax the muscles, it also increases nerve sensitivity to pain.

I was horrified. I discontinued Valium immediately. Three days later, I had a seizure in the pain management clinic during preparations for a cortisone injection.

My psychotherapist pointed out that I was exhibiting Valium withdrawal symptoms at my next visit. Under protest, I went back to a small dose of Valium and tapered off for five months. Then I wanted to know what else Dr. Smith’s treatment was doing to me. I insisted on a prescription for small Lamictal pills, so I could taper off properly.

Dr. Smith gave me the 25-mg Lamictal pills under protest. I spent the next five months very carefully reducing the dosage by 25 mg at a time. When I got down to 50 mg, I thought I was almost home free. So I cut the 25-mg pills in half and took half a pill every six hours, then stretched out the time between pills. I went down from 50 mg to zero Lamictal in one week.

Valium withdrawal is hell, and Lamictal withdrawal is super hell. For another four months after I got off Lamictal, the symptoms decreased very gradually. I researched withdrawal symptoms extensively, and found that most authors recommend a very long tail to the taper. I got fed up with the daily migraines, so I went to my pain management doctor and asked for a prescription for 5-mg Lamictal pills to treat migraines. He discussed options, and then agreed. I took half a pill per day for a month, then a quarter pill per day for another month. The strategy worked. The migraines decreased to a manageable point.

I also developed the Lamictal rash, which is clearing up now. GlaxoSmithKline, the manufacturer of Lamictal, warns that the drug should never be re-started in anyone who has ever had the rash, because of the possibility of “life-threatening or permanently disabling or disfiguring” skin disorders.

So far I’ve survived 17 months of drug withdrawal. And the symptoms are still hell. Maybe I should have tapered slower; I don’t know. But I certainly can’t go back and try it again.

GlaxoSmithKline recently posted the results of a study showing that Lamictal is no better than placebo for Bipolar Disorder Type 2, which was my diagnosis. So all this hell has been for absolutely nothing.

I stick with my original claim that I was normal when I felt depressed about my divorce. And I was socially healthy enough to ask for help from people I trusted: family, friends, and the medical profession. For this, I was poisoned.

Drug companies usually get the all the blame for psychotropic drug dependency, as if doctors are innocent lambs who have no other source of information. I think it’s time to re-evaluate who’s responsible for medical education. Roche Pharmaceuticals, for example, tells us what Valium can do as a muscle relaxant, but it does not tell us about the options for physical therapy, chiropractic, acupuncture, massage, stretching, yoga, ice packs, hot packs, capsaicin, anti-inflammatories, cortisone injections, or thermocoagulation of the cervical nerves. I found all these for myself. I don’t think it was Roche’s job to tell me about them. I do think it was Dr. Smith’s job.

With direct-to-consumer marketing, a patient can easily get as much drug information as a doctor. The prescribing information is available on the Internet. With enough dedication, a patient can also find information on surgical options, psychotherapy, physical therapy, and nutrition. So what do our doctors really offer?

We hope they offer good judgment. Before my experience with Lamictal and Valium, I assumed I didn’t have to check everything my doctors told me. I know better now.

Dr. Smith is not the only one at fault here. Over the years, I had dozens of health care professionals treat me for neck pain. Almost all of them told me that what I needed was what they knew how to do. The one exception was my first massage therapist. She said, “You need more than a massage. I want to refer you to a chiropractor.” The rest said, “You just haven’t stayed with my treatment long enough.”

Dr. David Healy suggested, purely as a thought experiment, that antidepressants would be safer if they were available over-the-counter. His main concern was antidepressant-induced suicide. He reports that some patients feel worse on antidepressants from the first dose, but their doctors push them to continue, and these are the ones at most risk of suicide. Consumers ordinarily stop taking anything that makes us feel worse. It takes persuasion by a trusted advisor to make us continue swallowing poison.

The human side of my story is trust. I learned that we can’t trust our doctors with our health. We have to do our own research and make our own decisions. Each individual doctor is just one source of information, and some are more useful than others. I am now pondering what a license to practice medicine really means.

 

This article was first published in the ICSPP Newsletter, 2009 – Number 1, pp. 5 – 7. See http://icspp.org for more information. 

The Ghost of Adam Smith

June 12, 2009

The Ghost of Adam Smith

The father of capitalist economics taught us to fear government action.

Linda Fugate, Ph.D., 598 words

Government bailouts – nationalized banks – economic stimulus package – and a $3.5 trillion dollar federal budget horrify free market American capitalists. They’re haunted by the ghost of Adam Smith.

“The Wealth of Nations”, Adam Smith’s monumental work from the late 1700′s, amounts to the capitalist manifesto. Most of our popular knowledge of economics is there: supply and demand, division of labor, free trade, and fear of government interference in the market.

Like astronomers, Adam Smith was an observational scientist. He didn’t invent capitalism; he just reported what he saw. And what he saw was enough to scare the wits out of right-wing politicians to this day.

The government Smith knew was King George III’s England, in the age of the American Revolution. Government economic regulations in his time were abysmally ill-conceived. Notably, British law made it almost impossible for unemployed workers to move to a different city or to change trades. No wonder they moved to America if they could.

Relocation within England was impractical because of the way the British government took over care of the indigent after the Church of England replaced the Catholic Church. The Catholic monasteries had offered charity as they could, without regard to location. After the Catholics were booted out, the British government ordered each parish to collect taxes to take care of its own poor people. Clearly, each parish then had an incentive to send the poor elsewhere. Workers who entered the parish were almost always ejected before they could establish residency, even if they found a job, because the parish leaders did not want the responsibility of supporting them in the future. Thus, it was common to find a shortage of labor in one city, with high labor costs, at the same time as high unemployment in another.

Within a city, “incorporated trade” laws of 18th Century England regulated work in most of the skilled trades. This was similar to our system of licensed professionals and certified technicians: plumbers, electricians, auto mechanics, hair stylists, etc. But in Smith’s time, the regulations were much more restrictive. Seven years of unpaid labor was the normal price of an apprenticeship, and no one in the working class could afford to do it for more than one trade.

The labor supply in this primitive capitalism was regulated by worker survival rates. Smith reported that on average, half the children born in England died before they were old enough to join the work force. More died in bad times, so that the price of labor increased and workers were able to raise more children. Competition from the increased number of workers then pushed both wages and child survival rates back down toward the long-term equilibrium. 

Adam Smith knew nothing of government activity that supports the market. Our cell phones, wireless computer networks, radios, broadcast television, and remote control devices, for example, would be useless without FCC regulations for sharing the radio frequency spectrum. Our market economy is far more complicated than Smith’s, and requires more complicated rules.

Our modern capitalism has far more government spending for education, research, transportation, and communication. And our economy is far more productive.

The ghost of Adam Smith is still afraid of government action in general. This is purely a matter of ignorance. We don’t have to follow the rules of 18th Century England, or of any time in the past. The American Revolution established our freedom to do what’s in our own interest. It’s time to put the ghost to rest.

 

Double Standard at the FDA

June 12, 2009

 

Should dietary supplements be held to higher regulatory standards than prescription drugs? Common sense says no, but the FDA says yes.

There are two regulatory battles in progress: one for dietary supplements [1 - 4], the other for off-label drug prescriptions [5 – 8]. Both issues concern health practices that are not evaluated or approved by the FDA.

Off-label prescribing is a common, legal, and poorly regulated practice that exposes millions of patients to adverse drug reactions. To gain entry into the U.S. market, drug manufacturers must provide evidence from clinical trials to show the FDA that their product meets the requirements for safety and effectiveness in treating at least one health condition. Then doctors are allowed to prescribe the drug for whatever they want, based simply on clinical judgment.

A recent survey reported in the Archives of Internal Medicine estimated that 21% of all U.S. prescriptions are written for off-label uses [5]. The authors used the DRUGDEX system from Micromedex [9] to evaluate the evidence to justify each off-label indication. They classified the indications as scientifically supported if effectiveness has been shown in controlled trials or observed in clinical settings. By these criteria, 73% of the off-label uses failed; they were thus classified as having little or no scientific support.

The rational for off-label prescribing is often based on lack of FDA-approved effective treatments [6], along with hints that the drug could be useful, such as [7]:

  1. a presumed drug class effect,

  2. extension to milder forms of an approved indication,

  3. extension to related conditions,

  4. expansion to distinct conditions sharing a physiological link,

  5. extension to conditions whose symptoms overlap with those of an approved indication.

Off-label prescribing has its benefits. It offers a wider range of treatment options to the patient, some of which may be reasonable and creative. For example, antidepressants have been used to treat hot flashes in women with breast cancer, who are afraid to use hormonal products [10]. The anemia drug erythropoietin has been prescribed for critically ill patients who need blood transfusions [8]. A variety of drugs have been tried on patients with chronic pain [11].

In practical terms, off-label prescribing is an “alternative” health care practice, just as homeopathy and acupuncture are. But prescription drugs raise particular concerns about safety and cost [12]. The FDA standard for approval is: “the benefits of a drug outweigh the risks” [13]. What this means is not well quantified. The risks may include anything from headache, dizziness, drowsiness, and nausea, up to coronary artery spasms (Relpax, a migraine drug) liver damage (many drugs), and suicide (Prozac and other antidepressants). [14]

The FDA has made some attempts to restrict promotion of off-label prescribing by the drug manufacturers. The pharmaceutical industry has responded with legal challenges to the FDA’s authority to limit free speech in the form of continuing medical education. This regulatory battle is ongoing [6].

What the FDA has failed to do is alert consumers to the difference between approved and off-label prescribing. When a doctor writes a prescription and a pharmacy fills it, the consumer generally assumes that the drug meets the standards for FDA approval. For millions of prescriptions per year, this is not true.

FDA treatment of dietary supplements is different. Most health educational material related to supplements must include the disclaimer: “This statement has not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.” The explanation provided on the FDA web site is [15]:

 

This statement or “disclaimer” is required by law (DSHEA) when a manufacturer makes a structure/function claim on a dietary supplement label. In general, these claims describe the role of a nutrient or dietary ingredient intended to affect the structure or function of the body. The manufacturer is responsible for ensuring the accuracy and truthfulness of these claims; they are not approved by FDA. For this reason, the law says that if a dietary supplement label includes such a claim, it must state in a “disclaimer” that FDA has not evaluated this claim. The disclaimer must also state that this product is not intended to “diagnose, treat, cure or prevent any disease,” because only a drug can legally make such a claim.

 

So why don’t off-label drug prescriptions include a disclaimer? To be consistent and responsible, the FDA should require the prescription label to say:

This off-label usage has not been evaluated by the FDA. This product has not been approved to diagnose, treat, cure, or prevent the disease it was prescribed for.

 

For now, it’s up to consumers to educate ourselves. Often there are safe, cost-effective alternatives to off-label drug prescriptions. Clearly, it is ridiculous to claim that only drugs can treat, cure, or prevent disease. It has been well known for over 100 years that Vitamin B1 treats, cures, and prevents beriberi. Vitamin B2 treats, cures, and prevents pelegra; Vitamin C treats, cures, and prevents scurvy, and so on. Research on nutritional health care includes both academic studies on the mechanism of action and a long tradition, sometimes hundreds or thousands of years, of safe use. Off-label drug prescriptions may be based on nothing more than an educated guess.

The FDA accepts comments from the public on its web site, at http://www.fda.gov/comments.html. It’s time for more consistent regulation of health information. Dietary supplements have much stronger scientific support than off-label drug prescriptions. The labeling should clearly indicate this.

  1. Sadovsky R, Collins N, Tighe AP, Brunton SA, Safeer R. Patient use of dietary supplements: a clinician’s perspective. Curr Med Res Opin. 2008 Apr;24(4):1209-16.

  2. Morrow JD. Why the United States still needs improved dietary supplement regulation and oversight. Clin. Pharmacol Ther. 2008 Mar;83(3):391-3.

  3. Bent S. Herbal medicine in the United States: review of efficacy, safety, and regulation: grand rounds at University of California, San Francisco Medical Center. J Gen Intern Med. 2008 Jun;23(6):854-9.

  4. Saldanha LG. US Food and Drug Administration regulations governing label claims for food products, including probiotics. Clin Infect Dis. 2008 Feb 1;46 Suppl 2:S119-21.

  5. Radley, David C, Finkelstein, Stan N, Stafford, Randall S. Off-label prescribing among office-based physicians. Archives of Internal Medicine 2006 May 8;166(9):1021-1026.

  6. Henney, Jane E. Safeguarding patient welfare: Who’s in charge? Annals of internal Medicine 2006 Aug 15;145(4):305-307.

  7. Stafford, Randall S. Regulating off-label use – Rethinking the role of the FDA. New England Journal of Medicine 2008 Apr 3;358(14):1427-1429.

  8. Hebert, Paul C, Stanbrook, Matthew. Indication creep: physician beware, CMAJ 2007 Sep;177(7):697-698.

  9. MICROMEDEX Healthcare Series. Greenwood Village, Colo: Micromedex; 2002.

  10. Carroll DG. Nonhormonal therapies for hot flashes in menopause. Am Fam Physician. 2006 Feb 1;73(3):457-64.

  11. Knotkova H, Pappagallo M. Adjuvant analgesics. Ned Clin North Am. 2007 Jan;91(1):113-24.

  12. Walton SM, Schumock GT, Lee K, Alexander GC, Meltzer D, Stafford RS. Prioritizing future research on off-label prescribing: results of a quantitative evaluation. Pharmacotherapy 2008 Dec;28(12):1443-52.

  13. From Test Tube to Patient: Protecting America’s Health Through Human Drugs, Fourth Edition, U.S. Food and Drug Administration, p. 21.

  14. Physicians’ Desk Reference.

  15. http://www.cfsan.fda.gov/~dms/qa-sup12.html

     

Should Viagra Be Tested on Children?

May 21, 2009

The FDA’s Pediatric Exclusivity Provision offers incentives to drug manufacturers to test their products on children.

Pfizer’s patents give it exclusive marketing rights to Viagra until at least 2011. But there are ways to get extensions on brand name drug rights. One way is to test them on children.

We might expect the FDA to require pharmaceutical companies to test drugs on children if they are intended for childhood conditions, such as attention deficit hyperactivity disorder (ADHD). But that’s not how it works. Testing drugs in adults is enough to get them approved by the FDA. Doctors can then prescribe them to anyone, for any condition they consider appropriate. So children often get left out of clinical trials.

In 1995, the American Academy of Pediatrics reported that very few drugs had sufficient label information for use in young patients. Congress responded in 1997 with the pediatric exclusivity provision of the Food and Drug Administration Modernization Act. This grants an extra six months of exclusive marketing rights, before generic versions are allowed on the market, for drugs tested on children.

So far (as of December 19, 2008), there are 159 drugs on the FDA’s pediatric exclusivity list. All met the minimum requirements of testing on children. They don’t all work for children: the test results were negative for 49 of them. It doesn’t matter how the tests come out; if the company completes the test program, it gets the six month bonus.

Also the drug doesn’t have to be tested for the same condition in children and adults. Casodex, for example, is a prostate cancer drug that was tested for precocious puberty in boys. It didn’t work, but the price will stay at $17 per pill for an extra six months before cheaper generics come on the market.

 So Viagra could be tested for runny nose, and win pediatric exclusivity, if Pfizer writes the proposal convincingly enough. One of the side effects in adults is nasal congestion, so who knows, it may work.

The costs of the pediatric exclusivity provision are high. In 2001, the FDA estimated the public will pay an extra $13.9 billion for high-priced brand name drugs, based on the results of the program in its first three years. Drugs granted pediatric exclusivity after that report include Zyvox, an antibiotic that costs $820 per pill, Argatroban, a blood thinner costing $1,250 per vial, and Sandostatin LAR, a growth hormone inhibitor costing $2,300 for a single-use injection kit. None of these demonstrated safety and efficacy in children.

So what are the benefits to children? Overall, the FDA expects the data generated by the pediatric exclusivity provision to improve health care for children and reduce the costs of hospital and doctor visits. Some of the drugs on the list are clearly important for children: asthma medications, surgical anesthetics, diabetes treatments, etc.

But do children need 12 drugs for high blood pressure and 6 for high cholesterol? What about 6 more for arthritis and 5 for glaucoma? That’s how many already have pediatric exclusivity for these conditions. When the FDA receives a proposal for pediatric testing, how do they decide whether children need it? Will they approve 12 more drugs for high blood pressure? Will they approve Viagra?

The FDA can do only what Congress gives it the authority and funding to do. In its 2001 report, the FDA suggested that Congress “Expressly codify FDA’s authority to require pediatric studies on drugs of importance to children.” This would mean stronger regulation of the pharmaceutical industry, as opposed to offering bonuses. It could save us a few billion dollars in health care costs. Maybe we don’t need to pay Pfizer to test Viagra on children.

 


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