In some cases, irritation may be caused by an infection and is not related to spermicide. Prevent Urinary Tract Infections Spermicides can make women more likely to have a urinary tract infection. To avoid urinary tract infections, urinate after sex to help clear bacteria from the urinary tract. Drink plenty of water. If you have sex again, apply another dose.
Most applicators are reusable.
But be sure to wash the applicator with soap and warm water every time. Do not douche for 4 to 8 hours after sex. Douching may wash away the spermicide and reduce your protection against pregnancy. You should use spermicides during every act of sex, whether or not you are having your period. Spermicides do not cause cancer.