antaphrodisiac (adj.)

1719, "used against sexual appetite;" 1742, "used against venereal disease;" from anti- + Greek aphrodisios "venereal" (see aphrodisiac). From 1753 as a noun, "medicine used against venereal disease." Antaphroditic is from 1706 as a noun, "medicine having the power to mitigate venereal disease;" 1755 as an adjective.