Remove this small thin sheet from wrapper and insert along back wall of vagina as far as you can go so the film rests near the cervix. Contraceptive protection begins 15 minutes after insertion and remains effective no more than one hour. Insert into vagina, near cervix. Contraceptive protection begins 10-15 minutes after insertion and remains effective no more than one hour. Meaningful comparisons between spermicide efficacy and other methods efficacy or between one spermicide preparation and another are impossible to make.
Consistent use is the most important factor minimizing failure with spermicides.
A woman can use the product without involving the partner in the decision if she chooses. The product can be available for immediate protection. Spermicides can be used at mid-cycle to augment other methods. A spermicide might be instill immediately if a condom breaks, although this is of questionable value since sperm enter the cervix seconds after ejaculation. A spermicide may be useful to provide additional lubrication during intercourse.