From look Darvocet pulls drug off U.S. market under pressure from FDA” href=”http://www.cleveland.com/business/index.ssf/2010/11/maker_of_darvon_darvocet_pulls.html” target=”_blank”>Cleveland.com:

WASHINGTON (AP) — The maker of the painkiller Darvon is pulling the
drug off the market under pressure from public health officials who say
it causes dangerous heart rhythms.

The Food and Drug Administration says the drugmaker Xanodyne will
halt marketing of Darvon and related brand Darvocet. The FDA has also
called on generic drugmakers to stop marketing low-cost versions of the
drug.

The FDA action puts the U.S. in line with Britain, which banned
Darvon several years ago due to suicides and accidental overdoses.

Darvon, first approved in the 1950s, is an opioid used to treat mild to moderate pain.

The consumer watchdog group Public Citizen had petitioned the FDA to
ban the drug, saying its benefits didn’t justify a risk that added up to
several hundred deaths a year.