Whether or not a pill will work depends mainly on what kind of pill it is. If it is a short-acting contraceptive pill, taking one pill will definitely not help. The short-acting contraceptive pill is taken on the fifth day of menstruation, and then once a day, once a tablet, 21 consecutive days will play a contraceptive effect, so the short-acting contraceptive pill is not useful only to take a tablet. The emergency contraceptive pill depends on which kind of contraceptive pill, if it is golden Yuting, after intercourse, within 72 hours to eat a piece of useful, can achieve the effect of contraception. If it’s regular Yohtex, you need to take one tablet within 72 hours and then another tablet 12 hours later to achieve contraception. So, if it’s regular Yohtex, taking one tablet won’t help.