What happens if you take too many birth control pills?

Mar 14, 2025 Source: Cainiu Health
Disease description:

Previously, I often took contraceptive pills for birth control. Recently, I heard that taking too many can be harmful. I feel very anxious and just want to know, what exactly are the effects of taking too many contraceptive pills on the body?

Doctor's answer (1)
Dr. Zhang Lu

Taking too many birth control pills may lead to endocrine disorders, menstrual irregularities, withdrawal bleeding, impaired ovarian function, gastrointestinal irritation, and an increased risk of thrombosis.

Common short-acting contraceptive pills mainly contain estrogen and progestin. Long-term excessive use can cause endocrine disorders. Hormonal imbalances may lead to irregular menstrual cycles, with periods occurring earlier or later than usual, and abnormal menstrual flow, sometimes heavier and sometimes lighter. Withdrawal bleeding may also occur, disrupting normal physiological patterns.

Emergency contraceptive pills contain high levels of hormones and have more pronounced side effects. Frequent use can severely impair ovarian function, inhibit ovulation, reduce fertility, and may even lead to infertility. In addition, the gastrointestinal tract can become irritated, causing symptoms such as nausea, vomiting, and loss of appetite. Long-term and excessive use may also increase the risk of thrombosis, especially in individuals with a predisposition to cardiovascular diseases.

For personal health, contraceptive pills should be taken strictly according to the instructions or medical advice. Do not arbitrarily increase the dosage or frequency of use, and try to choose other safe and effective contraceptive methods.