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Why can the contraceptive pill lose effectiveness?
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Why can the contraceptive pill lose effectiveness?

The combined oral contraceptive pill has a high reliability, around 99% if used perfectly and 91% with regular use.

The effectiveness of the pill can be reduced if it is not taken correctly or if it is forgotten, but also by the following factors:

  • Vomiting and diarrhea within 3-4 hours after taking the pill.
  • St. John's wort.
  • Certain medications.

For this reason, when taking the contraceptive pill, it is advisable to inform the specialist when taking any medication or herb, in case they reduce its effectiveness.

By (embryologist), (gynecologist), (gynecologist) and (embryologist).
Last Update: 04/26/2022