After taking progesterone capsules, of course, there is a possibility of side effects, but whether side effects will occur, or the severity and specific performance of side effects, in different individuals are not exactly the same. The side effects that may occur after taking progesterone include: 1, some women will have obvious headaches, dizziness, nausea, fatigue and other symptoms at the beginning of progesterone, generally after a few days of taking these adverse reactions will be reduced or disappeared. 2, progesterone for a long time or in large doses, may lead to liver function damage, transaminases rise. 3, there are some The progesterone capsules can cause the formation of skin discoloration, abnormal lipid metabolism and increase the chance of thrombotic diseases in women.