Cottonell, also known as cottonell acetate, is a new male contraceptive that can inhibit the division of spermatocytes in the testicular varicose duct, which can reduce the number of sperm significantly, thus achieving a contraceptive effect. The side effects of cotton cell acetate are small, and the main hazards are as follows: 1. Hypokalemia. The use of cotton wool acetate can cause hypokalemia, which can cause weakness of the lower limbs in severe cases. 2. nausea, vomiting, loss of appetite and other gastrointestinal reactions. 3. contraceptive failure. Although cotton wool acetate is highly effective in contraception, it still has a certain failure rate.