Didroxyprogesterone tablets are a progestin medication. If you want to delay your period, you need to start taking them 10 days before your period, otherwise it is easy to cause your period to still come while you are taking the medication. For when you want to stop taking the drug, it depends on when the patient will have her period. You can take it until you want to have your period and then stop taking it. Normally, you will have your period after 3-7 days of stopping the drug. The mechanism of action of drospirenone tablets is to increase the hormones in a woman’s body at the time of menstruation so that the endometrium will not shed. If the endometrium is deprived of hormonal protection when you suddenly stop taking drospirenone tablets, it will be shed and lead to menstruation.