Does taking 2 oral contraceptive pills at the same time have any effect?

Question
Hello doctor,
I am using a 21 pill blister pack but forgot to take it for two days while traveling. So I took 2 pills of another brand at the same time. The doctor asked me, does taking 2 oral contraceptives at the same time have any effect?
Anonymous customer
Answer
Answered by Master, Doctor Le Nhat Nguyen - Obstetrician-Gynecologist - Department of Obstetrics and Gynecology, Vinmec Danang International Hospital.
Hello,
To the question "Does taking 2 oral contraceptive pills at the same time have any effect?", the doctor would like to answer as follows:
How to take a daily pill of 21 pills as follows:
How to take the first blister: 1 tablet / day, from the 1st day of the menstrual cycle, continuously for 21 days; If menstruation has occurred within 5 days: take the first pill on the 5th day and continue 1 tablet / day until the end of the pack, use a condom or abstain from intercourse for the first 7 days of taking the pill. How to take the next pack: Take a break of 7 days after finishing the first pack, start taking the 2nd pack regardless of the date of menstruation. With the 21 pill, you are only allowed to forget one day. If two days have been missed, birth control pills are no longer effective for that cycle. Therefore, you should use another method of birth control (condom) and wait until your next period to take the Pill again.
If you still have questions about taking 2 oral contraceptives daily at the same time, you can go to a hospital of Vinmec Health System for further examination and advice. Thank you for trusting and sending questions to Vinmec. Wishing you lots of health.
Best regards!