5-FU injection and topical even in small doses cause both acute central nervous system (CNS) damage and progressively worsening delayed degeneration of the CNS in mice. This latter effect is caused by 5-FU-induced damage to the oligodendrocytes that produce the insulating myelin sheaths.
Home > Sexually transmitted infections > Syphilis > After treatment for syphilis. It is strongly advised that you do not have any sexual intercourse; including vaginal; anal or oral sex until you and your partner(s) have both finished the treatment and any follow-up treatment.
After a person gets syphilis, the disease begins in the primary stage. A person gets syphilis by having sex with a person who has syphilis. Usually, the person who has syphilis has wounds on their genitals caused by syphilis. Touching these wounds during sex (including oral sex or anal sex) can give a person syphilis.