Pfizer admits that
Cox-2 drug Bextra is linked to heart problems Clinical trials showed heart bypass surgery patients taking Bextra, an anti-inflammatory in same class as recently withdrawn drug Vioxx, had a higher risk of stroke and heart attack. It was already known that Bextra can cause a rare, but sometimes fatal, skin disorder called Stevens-Johnson syndrome to note that cases of condition are being seen more often with Bextra than with other drugs in same class. Warnings about this have been recently updated.
Bextra is approved to treat pain from arthritis and, like Merck & Co.'s Vioxx, is a COX-2 inhibitor. A recent trial showed Vioxx doubled risk of heart attack and stroke in arthritis patients who took drug for more than 18 months. This is significant because these patients are already at risk of stroke or heart attack. So a drug like Bextra could be very dangerous if Bextra increases and already higher than normal risk of stroke or heart attack.
The Vioxx withdrawal has cast a cloud over entire class of COX-2 inhibitors, which includes Bextra, Celebrex and an experimental drug from Novartis AG called Prexige.
However, Pfizer said that following Vioxx withdrawal it re-examined its clinical data base of 8,000 patients with rheumatoid arthritis and osteoarthritis and found no increased risk of dangerous heart events in patients taking Bextra for up to a year. The company also found no increased risk in a trial of patients taking Bextra in a general surgery setting. Of course, check source, as Cox-2 drugs like Bextra account for $6 billion in sales per year!
Doctors said it is too early to quantify potential risk of Bextra or of Pfizer's other COX-2 inhibitor Celebrex as neither have tested for long enough. Pfizer said it is conducting longer term trials in arthritis patients.
The coronary bypass trials are ones that Dr. Eric Topol of Cleveland Clinic Foundation and an early and outspoken critic of Vioxx, said he finds concerning as they show a cluster of heart attacks and strokes. But he said danger signal does not appear to be as strong as it was with Vioxx.
"Celebrex and Bextra do appear safer than Vioxx but whether they are really safe, especially in patients with heart risk, that's an open question," Topol said.
Pfizer has updated label on several occasions since it was approved in 2001 to reflect risk of Stevens Johnson syndrome, a form of allergic reaction often caused by certain types of drug. Symptoms usually begin as a blistering of mouth and lips, spreading to throat, tongue and other parts of body. The blisters sometimes become so extensive as to be fatal. The company also updated its warning that Bextra can cause a rare, but sometimes fatal, skin disorder called Stevens-Johnson syndrome to note that cases of condition are being seen more often with Bextra than with other drugs in same class. Now label should be updated to include information on stroke and heart attack risks from Bextra.
Bextra is approved to treat pain from arthritis and, like Merck & Co.'s Vioxx, is a COX-2 inhibitor. A recent trial showed Vioxx doubled risk of heart attack and stroke in arthritis patients who took drug for more than 18 months.
The Vioxx withdrawal has cast a cloud over entire class of COX-2 inhibitors, which includes Bextra, Celebrex and an experimental drug from Novartis AG called Prexige.
However, Pfizer said that following Vioxx withdrawal it re-examined its clinical data base of 8,000 patients with rheumatoid arthritis and osteoarthritis and found no increased risk of dangerous heart events in patients taking Bextra for up to a year. The company also found no increased risk in a trial of patients taking Bextra in a general surgery setting. Again, check source.
Doctors said it is too early to quantify potential risk of Bextra or of Pfizer's other COX-2 inhibitor Celebrex as neither have tested for long enough. Pfizer said it is conducting longer term trials in arthritis patients.
The coronary bypass trials are ones that Dr. Eric Topol of Cleveland Clinic Foundation and an early and outspoken critic of Vioxx, said he finds concerning as they show a cluster of heart attacks and strokes. But he said danger signal does not appear to be as strong as it was with Vioxx.
"Celebrex and Bextra do appear safer than Vioxx but whether they are really safe, especially in patients with heart risk, that's an open question," Topol said.
Pfizer has updated label on several occasions since it was approved in 2001 to reflect risk of Stevens Johnson syndrome, a form of allergic reaction often caused by certain types of drug. Symptoms usually begin as a blistering of mouth and lips, spreading to throat, tongue and other parts of body. The blisters sometimes become so extensive as to be fatal. The company also updated its warning that Bextra can cause a rare, but sometimes fatal, skin disorder called Stevens-Johnson syndrome to note that cases of condition are being seen more often with Bextra than with other drugs in same class.
