Can You Take Both Pre and Post-Coital Birth Control Pills? - Obstetrics and Gynecology

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When it comes to birth control, understanding the different types of contraceptive methods and their appropriate use is crucial for effective family planning. In your case, you are currently taking a pre-coital birth control pill (also known as an oral contraceptive pill) and are concerned about the need for a post-coital birth control pill (commonly referred to as emergency contraception) after having unprotected sex.

First, let’s clarify how oral contraceptives work. The primary function of pre-coital birth control pills is to prevent ovulation, thicken cervical mucus to block sperm, and thin the uterine lining to prevent implantation. When taken consistently and correctly, these pills are highly effective in preventing pregnancy. It typically takes about 7 days of consistent use for the pill to reach its full effectiveness, although some formulations may offer quicker protection.

In your situation, since you started taking the pill on July 30 and had unprotected intercourse on August 4, you were only on the pill for six days. If you had not taken the pill for a full week prior to having sex, there is a possibility that you may not have been fully protected against pregnancy at that time.
Now, regarding the use of emergency contraception: if you are concerned about the possibility of pregnancy due to unprotected intercourse while not fully protected by the oral contraceptive, taking a post-coital birth control pill (emergency contraception) is a valid option. Emergency contraceptive pills, such as Plan B or Ella, are designed to prevent pregnancy after unprotected sex and are most effective when taken as soon as possible after the event, ideally within 72 to 120 hours, depending on the specific medication used.

It is important to note that taking emergency contraception does not interfere with the effectiveness of your ongoing oral contraceptive regimen. You can safely take both types of pills; however, it is advisable to continue taking your regular birth control pill as prescribed.
In summary, if you are feeling anxious about the risk of pregnancy after unprotected intercourse while on the pill for less than a week, it would be prudent to take emergency contraception. This will provide an additional layer of protection. After taking emergency contraception, continue with your regular birth control pills as scheduled. If you have any further concerns or questions, it is always best to consult with your healthcare provider for personalized advice and guidance based on your specific situation.

Lastly, remember that while oral contraceptives and emergency contraception are effective methods of preventing pregnancy, they do not protect against sexually transmitted infections (STIs). If you are at risk for STIs, consider discussing additional protective measures, such as condoms, with your partner.