Drospirenone ethinyl estradiol tablets are third generation short-acting oral contraceptives. Oral short-acting contraceptive pills must be taken continuously to have contraceptive effect, 21 days per cycle, one tablet per day, 21 days for a course of treatment. If it is the first time you take it, you need to take it continuously for 7 days in order to get the effect of contraception. Therefore, it is not possible to take one tablet of Drospirenone alone. If you want to take one pill to achieve the effect of contraception, you can take oral emergency contraceptive pill levonorgestrel tablets. The emergency contraceptive pill contains a large amount of hormones, and one tablet taken within 72 hours of intercourse can achieve the contraceptive effect.