Following oral administration of a single 300 mg dose of tenofovir disoproxil fumarate to HIV-1 infected patients in the fasted state, maximum tenofovir concentrations were achieved within one hour and the Cmax and AUC (mean ± S. D.) (%CV) values were 296 ± 90 ng/ ml (30%) and 2,287 ± 685 ng• h/ ml (30%), respectively.