
If your period has become irregular or gone missing, your doctor will need to work through various possible explanations, including whether it’s a side effect of one of your medications.
Some medications affect the menstrual cycle directly, by impairing ovulation or altering hormone levels. Others act indirectly, by affecting appetite, stress, sleep, or weight. And some can even have a beneficial effect, such as antihistamines, which can lighten periods and improve premenstrual mood symptoms.


