Is taking oral contraceptives daily for a long time harmful?

Currently, there are many cases of using oral contraceptives (monthly birth control pills) without knowing how to take birth control pills properly, losing their effectiveness or causing side effects affecting health. So is taking birth control every day harmful?
In fact, in addition to the contraceptive effect, taking monthly birth control also brings other great benefits to women such as improving acne on the skin; skin beauty; reduce the risk of dangerous diseases in which the most common are breast tumors, endometrial cancer, ovarian cancer; regulate the menstrual cycle; prevent osteoporosis and reduce the possibility of premenstrual syndrome...
With the main ingredients being estrogen and progesterone, daily oral contraceptives work to create a vaginal environment that is not ideal for fertilization sperm, preventing ovulation and minimizing the possibility of conception. So if you take birth control properly, there will be no harm. Currently, there is no evidence that oral contraceptives can cause infertility.
Although it is one of the most popular methods of contraception, trusted by many women due to its convenience and high ability to prevent pregnancy, taking monthly birth control still has certain risks, depending on the situation. health status of each person, especially when using the drug daily for a long time.

Previously, to prevent pregnancy, women had only one option of oral contraceptive pills, with a course of: Daily hormonal pills, taken for 21 days, then a placebo for 7 days. During the placebo week, you will get your period. Currently, the monthly oral contraceptive pill is much more diverse, including those with a 4-day placebo combination and those without a placebo combination.
Most people can use the monthly oral contraceptive pill for many years under the guidance of a doctor if there are no side effects. However, you must know how to use birth control pills daily to help maximize effectiveness. Some common side effects when taking monthly birth control pills such as: Vaginal bleeding between periods, nausea, breast tenderness, headache, weight gain, mood swings, vision problems, decreased libido, amenorrhoea....
If you intend to take monthly birth control pills for a long time, you should see a specialist doctor to examine and know how to use birth control pills daily correctly and most effectively. , avoid abuse leading to danger to health.