Wednesday, March 11, 2009

Of mice and men ...


On March 4, 2009, the U.S. Supreme Court issued a 6-3 majority decision in Wyeth v. Levine, No. 06-1249 against the pharmaceutical giant. The Court held that the Food and Drug Administration's (FDA) prescription drug labeling judgments, and specifically, its approval of the label for Wyeth's Phenergan, do not preempt state law tort claims alleging inadequate warning. At issue was a lawsuit by Vermont guitarist Diana Levine, who lost an arm to gangrene after Wyeth’s antinausea drug Phenergan was INADVERTENLTY injected into one of her arteries during a push IV injection. Ms. Levine had gone to a clinic for treatment of a migraine headache. Ms. Levine argued that Phenergan’s labeling, though approved by the Food and Drug Administration, didn’t provide proper warnings of the risk of administering the drug through a push IV injection instead of using an IV-drip.

For those following the case over the past few months, it was evident that heads would turn regardless who the court ruled in favour of. But few were expecting the decision to go against Wyeth, especially since the courts had ruled in favour of pre-emption in a similar case involving a medical device (see
Riegel vs Medtronic). Ultimately, what it came down to was the presence of explicit wording in the Medical Devices Act saying “no State ‘may establish or continue in effect with respect to a device . . . any requirement’ relating to safety or effectiveness that is different from, or in addition to, federal requirements …”. Nothing of that sort is present in the Food, Drugs, and Cosmetics Act. So why did Wyeth’s legal team even consider pre-emption to be a plausible defense? Apparently the FDA was in the mood for an ol fashioned power trip in a preamble to a 2006 regulation the agency issued on prescription drug labeling. This included statements that the agency can indeed pre-empt state law as they provided for not only a floor but also a ceiling to such labeling language, and so on. Wyeth seems to have relied a bit too heavily on this preamble. So this decision might look like a whack at the drug industry, but it's actually a case of a federal agency being told that its powers aren't as broad as it occasionally seems to think. You wouldn't necessarily guess it to see that way the justices lined up in this case, but the verdict looks like a real endorsement of federalism. And in the same way, you might not guess it, but the drug companies would probably like for the FDA to be that powerful, actually - that way, some of the responsibility could be offloaded, and there would be a single place to go for regulatory clarity.


Of equal importance and worth mentioning is that this unfortunate incident could easily have been avoided but for the EMT’s negligence in administering the drug in a way the manufacturer did not intend. This litigious society is going down the toilet. Obviously, Ms Levine should be compensated, but by those who made the mistake, not by those who provided the cure, that when administered properly would have helped her, not harmed. I cannot help but think the main reason they went after Wyeth is because Wyeth is seen as the party with the deepest pockets. This is not to say that Wyeth was completely devoid of fault. The bigger issue is clearly whether or not it is pharma’s responsibility to provide adequate warnings in conflict with FDA approval. As it stands, and regardless of what the FDA says, the burden of proof is not on the FDA to prove harm, but rather on the manufacturer to prove its product is safe. The FDA warning requirements provide a “basement not a ceiling” - e.g., the manufacturer has some responsibility to update its labels and warnings over time, when more evidence is obtained as to the safety or danger of its products.


Preemption has a place but not in this case and not with these facts. That Wyeth could have requested a label change to reflect its growing awareness of possible heightened risk from certain routes of administration is incontrovertible. That Wyeth claimed that it could not have done so flies in the face of reason and past experience. None of this suggests, however, that a good case cannot be made for preemption. This just wasn’t that case. The facts were not on Wyeth’s side. All this is simply to suggest that I don’t think this is the last we’ll hear of preemption or the last the Supreme Court will have to say on the doctrine.


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Thursday, March 5, 2009

The 28 day round-up


Despite the rumblings of layoffs, downturns, redundancies and bailouts, February seems to have been a good month for drug approvals globally. Following are some noteworthy developments.

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Matrix Labs received the first and only World Health Organization (WHO) approval for Lopinavir/Ritonavir Tablets, 200 mg/50 mg. Matrix's version of this product is heat-stable and affordable, making it practical for distribution and use in warm climates. A WHO approval indicates that a drug meets international safety, efficacy and manufacturing quality standards. With such status, Matrix can sell the treatment in most countries outside the United States and Europe. The company's emphasis on producing affordable products has allowed it to drive down the average annual cost per patient of effective therapies. Approximately 30% of HIV/AIDS patients in the developing world depend on Matrix's ARV products.

- The US FDA has approved ATryn® (Antithrombin [Recombinant]) for the prevention of peri-operative and peri-partum thromboembolic events in hereditary antithrombin deficient patients. The GTC Bio & Ovation Pharma collaboration is the first ever transgenically produced therapeutic protein and the first recombinant antithrombin approved in the U.S. Along with the approval of ATryn, the FDA’s Center for Veterinary Medicine also approved GTC’s New Animal Drug Application,
the first of its kind for the regulation of a genetic construct stably integrated into the genome of genetically engineered animals. This is now required for a recombinant technology used to develop transgenic animals, such as the goats that produce recombinant antithrombin.

-Good news for patients with osteoarthritis of the knee. The FDA has finally approved Genzyme's Synvisc-One which could potentially change the face of viscosupplementation therapy.
Viscosupplementation is a procedure in which hyaluronic acid or a derivative such as hylan G-F 20 is injected into the knee joint to replace synovial fluid that typically becomes degraded in patients with osteoarthritis. Synvisc-One is an important therapy for OA of the knee because it delivers long-term pain relief (upto 6 months) through a single injection without the systemic side effects that can be caused by steroids and anti-inflammatory medication.

-Over 5 million gout patients with hyperuricemia have a new treatment option for the first time in 40 years. Teijin Pharma's new molecular entity, Febuxostat, is licensed to Takeda for marketing in the US where it will be available as ULORIC.

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The European Commission has granted marketing authorisation for Servier's Valdoxan(R) /Thymanax(R) (agomelatine), the first melatonergic antidepressant for the treatment of adult patients with major depressive episodes. Valdoxan is the first antidepressant with melatonin receptor (MT1) and (MT2) agonist properties and 5-hydroxytryptamine (serotonin) receptor 2C (5-HT2C) antagonist properties. This unique receptor profile of Valdoxan allows for the first time the restoration of the circadian rhythms of depressed patients. Valdoxan's mechanism of action is unlike those of the commonly-prescribed antidepressants, the SSRIs and SNRIs, as Valdoxan exerts its antidepressant efficacy without having an impact on serotonin levels.

-Dapoxetine has received marketing authorisation in Finland and Sweden for the on-demand treatment of premature ejaculation (PE) in men 18-64 years of age

-A big bump for companies in Canada, as some potential major earners received approval. The 44 NOC's issued by Health Canada included- Lilly's Cymbalta for Generalized Anxiety Disorder; Schering Plough's much anticipated contraceptive NuvaRing; Shire's Vyvanse for ADHD; Wyeth's antidepressant Pristiq; and a new indication for Avastin by Roche. The increasing number of drug submissions in Canada is a sign that manufacturers now consider the Canadian market to be substantial and profitable enough to hit those earning targets despite price controls, a public payer system, and generics friendly IP laws.

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