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.
HIV-infected patients with early latent, primary, or secondary syphilis should have repeat VDRL or RPR testing at 3, 6, 9, 12, and 24 months following treatment or until the test becomes nonreactive. The same test (i.e., VDRL or RPR) done in the same lab helps assure that comparisons are valid over time.