[Real and false risks of local contraception: spermicides and the diaphragm]

A critical analysis of recent publications about spermicides and their side-effects has been made. The modern spermicides consist principally of nonoxynol-9 and benzalkonium chloride. The products are harmless and efficient when used correctly at each sexual intercourse. Experiments on rabbits and rats show that nonoxynol-9 is absorbed through the vaginal wall. Benzalkonium chloride is not absorbed, as shown by tests in women and rats. The diaphragm as a method of contraception does present several psychosomatic drawbacks. It appears harmless; allergy to rubber or the septic shock syndrome are extremely rare.