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Pfizer to drop development of drugs for hyperlipidemia, atherosclerosis

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Pfizer to drop development of drugs for hyperlipidemia, atherosclerosis, and heart failure

New York, NY - Pfizer is getting out of the cholesterol-lowering game to focus on what it perceives to be more lucrative diseases, according to an internal memo obtained by Forbes [1]. And for the most part, the chosen "disease areas" don't include the heart.

In the memo, Martin Mackay, president of Pfizer Global Research & Development (R&D), informed his staff that the company plans to "exit" the fields of atherosclerosis/hyperlipidemia, heart failure, obesity, and peripheral arterial disease.

Instead, the company, whose cholesterol-lowering drug atorvastatin (Lipitor) is the world's top-selling drug, says it is turning its attention and R&D dollars to cancer, diabetes, Alzheimer's, pain remedies, and mental health as its "higher-priority areas."

The news comes in the wake of the flop of Pfizer's hoped-for new flagship, torcetrapib, a CETP inhibitor that was widely predicted to be the company's next blockbuster drug. While CV drugs have been the major moneymakers for Pfizer in recent years, those days are drawing to a close. In addition to Lipitor, which will lose patent protection in 2011, Pfizer's other major player in the CV drug arena is Norvasc (amlodipine), which came off patent in 2007.

Among the lower-priority "disease areas" where the company says it will continue working are thrombosis and transplant, the memo notes.

Contacted by heartwire, a handful of leaders for some of the major Pfizer-sponsored trials in cardiovascular disease over the past decade declined to comment on the company's announcement or speculate on what it might mean to the field of CV drug development—with one exception. Dr John Kastelein (Academic Medical Center, Amsterdam, the Netherlands), who was an investigator in the Pfizer-sponsored ASAP, TNT, and IDEAL trials, called Pfizer "a real powerhouse" in the CV drug arena.

"I kind of knew this was coming, but when you see it in print, it still hits hard," he told heartwire. "I think this is very, very significant both for the company itself and for the whole field of CV drug development. Pfizer had truly excellent people in the development arm of their company for CV and metabolic drugs, and they've contributed to this whole notion that you need more robust LDL lowering and that that's better than mild LDL lowering, which has become one of the axioms of CV prevention. And if they're stepping out now, that not only signifies their own problems, but it also signifies the problems in CV drug development, and how incredibly difficult and costly it has become to bring new drugs forward. And that's not good for patients."

Kastelein predicts that drug companies, having "lost faith" somewhat in HDL-raising therapies, will need to look more closely at anti-inflammatory drugs in the setting of coronary artery disease. "But there, the problem is, if you have no biomarkers whatsoever to do even dose-finding studies, you need to move from relatively small phase 2 trials to incredibly large, hard-outcome studies, which is taking quite a risk," he said. And that, at least for Pfizer, is too much risk.

"Everyone, not just Pfizer, is realizing that the days of the really big blockbuster drugs are over. And what is going to replace that are drugs in a class that are 10 times or 100 times more difficult to develop, so the risks are much higher. And these days, after Avandia and ezetimibe, everything is about safety. This means the FDA is forced, by public and colleague pressure, to demand even larger databases before drugs are going to market, which is of course making it more expensive. It's a cycle that's very hard to break."

Source
Herper M. The Pfizer memo. Forbes, September 30, 2008.
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