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.
The recommendation is to take Cialis 30 minutes prior to sexual activity, while with Viagra and Levitra, users are instructed to take the drug 60 minutes before sexual activity. Generally, the effects of Cialis last 24 to 36 hours after taking it.