There are different types of topical contraceptives, such as topical pessaries, diaphragms, and tablets, and most of the ingredients in these medications are similar, just in different dosage forms. So there is no such thing as which drug is the safest. Topical contraceptive pills are medications that are put into a woman’s vagina and are able to kill sperm, thus providing contraception, and need to be used correctly. There is a process of dissolution after the drug is put in, and you must wait 5-10 minutes before having intercourse. If the time is too long, the effect of the pill will be reduced. Repeated sexual intercourse or prolonged sexual intercourse should be reapplied. There are also some side effects of external contraceptive pills, some people may have an allergic reaction after use, such as itching and pain in the external vagina of women, or more severe irritation of the penis in men. Occasionally, urinary irritation symptoms such as urinary urgency and frequency may occur. In such cases, it is best to stop using external contraceptives and choose other contraceptive methods.