GlaxoSmithKline's patent on AZT expired in mid September; days later, the FDA OK'd the first generic versions of the drug for sale in the United States. Generic AZT, also called zidovudine, made by Roxane Laboratories of Columbus, Ohio, and by India's Ranbaxy Laboratories and Aurobindo Pharma were cleared for the U.S. market. The generic versions may cost as little as $105 annually. The patents on Glaxo's multidrug pills containing AZT'Combivir and Trizivir'remain in effect.
AZT is the second anti-HIV medication with a generic equivalent available in the United States. Didanosine (ddI) DR'originally sold under the brand name Videx EC'was the first in December 2004.
