Is menorrhagia after 30 days due to side effects after taking birth control pills?

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Hello doctor! I had a birth control pill at the beginning of the month and had menorrhagia 30 days after I injected the pill. So the doctor asked me if menorrhagia after 30 days is due to side effects after injecting birth control pills, if long-term menorrhagia is dangerous? Ask your doctor for advice and answers. Thank you sincerely!
Nguyen Thi Tuyet Nhung (1993)
Reply
Hello! Oral contraceptive injection is one of the temporary methods of contraception using hormones, which has been around for a long time. The effect of the injection is long, so it is not necessary to take it every day. However, just like taking oral contraceptives, there are also unwanted side effects after taking birth control pills. After injecting birth control pills, the effect lasts from 1-3 months depending on the type of drug, because of the long duration of action, it is not necessary to use it every day to avoid frequent forgetting to take the pill and reduce the effect of the pill. oral contraceptives, but if there are side effects, they cannot be stopped immediately.
After injecting birth control pills, there may be some side effects such as: Amenorrhea because the uterine lining does not grow thick and peel off, so there is no menstrual phenomenon; Menorrhagia, heavy bleeding are also often encountered after the first injection. If you only have a little blood, it does not affect anything, but if you bleed a lot, it can cause iron loss in the blood. You should increase the use of iron-rich foods or take iron supplements to limit the risk of iron-deficiency anemia. If the condition affects your health or does not improve with subsequent injections, you should consider using another method of contraception.
So, in your case, after the first injection of birth control pills, it can cause menorrhagia and heavy bleeding. You should not be too worried but need to monitor more. However, if this condition continues for a long time and the amount of bleeding is more, you should go back to a medical facility or go to a hospital under Vinmec Health System for a doctor to examine and consult more closely. Thank you for trusting and sending the question: "Is menorrhagia after 30 days due to side effects after taking birth control pills?" to Vinmec. Wishing you lots of health. Best regards!

Answered by Specialist I Pham Thi Yen - Specialist in Obstetrics and Gynecology - Department of Obstetrics and Gynecology - Vinmec Hai Phong International General Hospital