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 Prognosis. Primary, secondary, and early latent syphilis can be treated successfully with antibiotics. Late latency (more than 1 year after the secondary stage) is difficult to treat. Tertiary syphilis has a very high mortality rate due to the far-reaching effects of the disease on the central nervous system.