antaphroditic

from The Century Dictionary.

• Having power to mitigate or cure venereal disease, as a drug.
• Same as antaphrodisiac.
• noun A drug which mitigates or cures venereal disease.
• noun Same as antaphrodisiac.

from the GNU version of the Collaborative International Dictionary of English.

• noun An antaphroditic medicine.
• adjective Antaphrodisiac.
• adjective rare Antisyphilitic.