Pharmaceutical companies developing drugs to fight blood clots
October 20th, 2008 by Jennifer Walker-Journey
Five pharmaceutical companies are working on new medications to treat blood clots, also known as thrombosis, according to The Wall Street Journal. Thrombosis is a serious problem affecting nearly 900,000 Americans each year, and resulting in nearly 300,00 deaths annually. Currently, heparin and Vitamin K antagonists are the only two principal treatments for blood clots.
The blood thinner heparin made news recently when the FDA recalled batches of heparin after more than 80 people died and several others became ill after receiving heparin. It was later determined that heparin made by Baxter International was contaminated in the company’s Chinese manufacturing facility.
While heparin is considered an effective treatment for preventing blood clots and is widely used, it must be injected, which makes long-term therapy difficult. The new drugs would be taken by mouth, which would make dosing easier and eliminate the need for laboratory monitoring.
Heparins garner about $700 million in annual sales, with Sanofi-Aventis’ Lovenox making up nearly two-thirds of the world’s share of the drug. Pfizer’s Fragmin and GlaxoSmithKline’s Fraxiparine account for 6.3 and 5.9 of sales, respectively. Vitamin K Antagonists are responsible for more than $6 billion in sales worldwide, with Bristol-Myers Squibb’s Coumadin, Barr’s Warfarin and Eisai’s Warfarin owning slightly more than half the market’s share.
Three of the five companies are in the late phases of clinical testing, two of which already have been approved in Canada and are awaiting approval in the United States. Two other companies’ drugs have been approved for short-term use in Europe.
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