NCIt definition : A mesylate salt form of delavirdine, a synthetic, non-nucleoside reverse transcriptase
inhibitor. In combination with other anti-retroviral drugs, this agent has been shown
to reduce HIV viral load and increase CD4 leukocyte counts in patients. As an inhibitor
of the cytochrome P450 system, delavirdine may result in increased serum levels of
co-administered protease inhibitors metabolized by the cytochrome P450 system.;