There are benefits to taking vitamin C after taking birth control pills. Most birth control pills contain estrogen and progestin, which are hormonal drugs. It may cause nausea, vomiting, loss of appetite, dizziness and other physical discomfort. Taking the right amount of vitamin C after taking the pill can reduce the stimulation of the gastrointestinal tract by the pill; enhance the absorption of the drug and make it work better; it can also improve the body’s resistance, so it is very beneficial to take some vitamin C after taking the pill. Long-term use of the pill may adversely affect the endocrine system, causing menstrual cycle disorders, abnormal menstrual blood volume and other abnormal menstrual conditions. It is recommended to take birth control pills under the guidance of a doctor.