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.
What causes syphilis? Bacteria cause syphilis. They usually enter the body through the tissues that line the throat, nose, rectum, and vagina. A person with syphilis who has a sore or a rash can pass the infection to others. An infected pregnant woman can also pass syphilis to her baby. Some things increase your chance of getting syphilis. They include: Having unprotected sex (such as not using condoms or not using them correctly). This risk is high among men who have unsafe sex with other men. Having more than one sex partner and living in an area where syphilis is common. Having a sex partner who has syphilis. Having sex with a partner who has many sex partners.