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.
Syphilis affects the body in stages. Stage 1: Primary stage. Sores appear in the genital (penis or vagina) area or the mouth within 10 days to 3 months after infection. The sores are usually firm, round, small, and painless. The sores should go away on their own, but bacteria stays in the body (without treatment).