A composition which is a contraceptive with potent anti-HIV activity. The composition is a high energy coprecipitate of nonoxynol-9 oligomers, polyvinylpyrrolidone (PVP) and iodine or PVP-I and shows a pronounced synergistic, anti-HIV effect between the compounds of the composition. A method of obtaining a contraceptive and anti-HIV environment in a female comprising administering to said female an effective amount of a high energy coprecipitate
