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 the initial infection, usually by sexual contact with a syphilitic lesion, there is an incubation period of about 3 weeks before the symptoms of primary syphilis develop. The primary lesion of syphilis is a chancre that occurs at the site of inoculation, most often the genitals.