HomeAnswersSexologypost-exposure prophylaxisWill PEP be effective after 66 hours of unprotected sex?

Started PEP after 66 hours of unprotected sex. Will it be helpful?

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The following is an actual conversation between an iCliniq user and a doctor that has been reviewed and published as a Premium Q&A.

Answered by

Dr. Bharat Udey

Medically reviewed by

iCliniq medical review team

Published At July 15, 2016
Reviewed AtJanuary 17, 2024

Patient's Query

Hi doctor,

I had unprotected sex and have consulted a doctor after that. He told me to go for PEP immediately. So, I started PEP after three days of exposure with one Tablet of Lamivudine and Zidovudine along with one Efavirenz tablet. I have taken PEP after 66 hours of exposure. Will it be helpful? Please let me know.

Answered by Dr. Bharat Udey

Hello,

Welcome to icliniq.com.

  • PEP (post-exposure prophylaxis) is highly effective if taken within first 12 hours of exposure. However, efficacy is high enough if taken within 72 hours of exposure as well. Efficacy decreases afterwards.
  • As you have started PEP within 66 hours of unprotected coitus, it is effective and need not to be worried about it.

For further doubts consult a sexologist online --> https://www.icliniq.com/ask-a-doctor-online/sexologist

Same symptoms don't mean you have the same problem. Consult a doctor now!

Dr. Bharat Udey

Dr. Bharat Udey

Geriatrics

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