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Dr.M.D.Mazumdar, Doctor
Category: OB GYN
Satisfied Customers: 9036
Experience:  MD (Obst&Gynecology)
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I had unprotected sex Saturday morning. I'm on birth control

Customer Question

I had unprotected sex Saturday morning. I'm on birth control and started my new pack last Monday. I was on the zpack wed-Sunday. I took plan b Saturday morning. My boyfriend did not ejaculate. Did the z pack cancel out my birth control. Could pre sperm be an issue, chance of pregnancy?
Submitted: 2 years ago.
Category: OB GYN
Expert:  Dr.M.D.Mazumdar replied 2 years ago.
If you started a new pack on Monday, then you would have taken 7 pills by Saturday. Taking 7 days of BC pills in a row protects against pregnancy.
While many antibiotics do affect birth control pills, there are no reports of z pack decreasing the effectiveness of a birth control pill.
Since you have also taken Plan B, the chances of you getting pregnant are very less.
Precum does contain sperm but you are well protected by the BC pills and the plan B.