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 is a highly contagious disease spread primarily by sexual activity, including oral and anal sex. Occasionally, the disease can be passed to another person through prolonged kissing or close bodily contact.Although this disease is spread from sores, the vast majority of those sores go unrecognized.econdary stage rash on the palms of the hands. The secondary stage may last one to three months and begins within six weeks to six months after exposure. People with secondary syphilis experience a rosy copper penny rash typically on the palms of the hands and soles of the feet.