The following reactions will occur after taking progesterone: 1. If the progesterone pills are taken orally, dizziness will occur about 1 hour after taking the pills. It is best to rest in bed to avoid falling, and it is also recommended to take it orally before going to bed to avoid dizziness symptoms.2. Menstruation will occur about 3-7 days after stopping progesterone, and the corresponding clinical symptoms will gradually ease if it is used to settle the fetus.3. Some people may experience mild nausea and other gastrointestinal reactions after taking progesterone, which can be taken after meals and will reduce these symptoms. The above symptoms are caused by adverse drug reactions, these adverse reactions do not need to be nervous, appropriate rest or change the time to take the drug can reduce the appearance of adverse reactions.