Doctors test double Tamiflu dose to cut H5N1 deaths

HONG KONG (Reuters) - Doctors in Asia and the United States will give double doses of Tamiflu to patients suffering bird flu and severe seasonal human flu from May in a trial aimed at cutting high death rates from avian flu.

People infected with the H5N1 bird flu virus are now prescribed the standard dose of Tamiflu, which is one capsule twice daily for five days.

But less than half the patients survive.

"In animal studies, higher doses of Tamiflu have resulted in higher cure rates for H5N1. The death rate from H5N1 is 60 percent, we want to see if we can solve this problem," said Tawee Chotpitayasunondh, senior medical officer at Thailand's Ministry of Public Health.

Indonesia, Thailand, Vietnam and the United States will participate in the Tamiflu clinical trial.

All bird flu victims will be included in the trial and each country will pick 100 patients suffering from severe human flu.

In both categories, half of the participants will be given the standard Tamiflu dosage, while the other half will be given double doses, or 150 mg orally, twice daily for 10 days.

Severe human flu cases would be included because some symptoms and complications were similar to H5N1, such as pneumonia.

"We'll find out if it is safe to give double dose," Tawee said.  Continued...