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.
PDE-5 inhibitors increase blood flow to the penis, and can be taken 15 minutes to 4 hours prior to intercourse (depending upon the drug). Cialis can be given on a daily basis without regard for sexual activity timing, but it is given at a lower dose.