Under the guidance of a doctor to take progesterone capsules to promote menstruation generally does not produce greater harm, if long-term use of the drug or improper use of the drug, there may be allergies, bleeding, headache and dizziness, weight gain and other hazards. 1. Allergy: some women are allergic to a certain component of progesterone capsules, taking this drug may appear allergic, manifested as itching, skin edema, erythema and other symptoms. 2. Bleeding: the main component of progesterone capsules is progesterone, which belongs to the progesterone drug, some patients may experience bleeding after taking the drug, such as breakthrough bleeding, vaginal spotting bleeding and so on. 3. headache and dizziness: some patients take progesterone capsules, due to the fluctuation of hormone levels in the body, there may be headache and dizziness, and even nausea and vomiting. 4. Weight gain: some patients eating progesterone capsules may appear after the phenomenon of sodium retention, may also lead to an increase in appetite, thus overeating, there will be weight gain. Patients need to follow the doctor’s instructions to eat progesterone capsules, to avoid the phenomenon of unauthorized stop, add or reduce the drug.