You can have intercourse 3-7 days after stopping the drug with chitosan, but it is best to go to the hospital for a checkup after using the drug to determine whether the primary disease in question has been cured, and then decide whether the drug can be stopped. If the disease is not completely cured, you can continue to use the drug; if it has been cured, you can stop using the drug. Pay attention to hygiene during sex, and if you are not planning to get pregnant, it is best to take good contraceptive measures, and you can use condoms to prevent pregnancy. In daily life, women must pay attention to the local cleanliness of the vulva, wash once a day and change underwear diligently.