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Combined contraceptive pill (breakthrough bleeding)

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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This is a checklist in cases of possible breakthrough bleeding (BTB) occurring in COC takers. BTB bleeding may occur during the first few months after prescribing a new COC. If it persists then a cause must be sought.

History:

  • taking of COC - ? missed pills ? taken at same time
  • medication - ? enzyme inducers
  • history of gastroenteritis ?
  • is there a possibility of pregnancy or disorder associated with pregnancy e.g. trophoblastic tumour ?
  • factors affecting absorption of pill e.g. ileostomy ?
  • history of post-coital bleeding ? CIN ? - will need referral for colposcopy

Examination:

  • pelvic and speculum examination - swabs and cervical smear if indicated

If all possible causes have been excluded then the COC may be changed. Options include:

  • a user taking a monophasic pill may try a phasic pill
  • an increased level of progestogen
  • a different type of progestogen e.g. consider a 3rd or 4th generation COC
  • in some cases a high dose (50 mcg pill) may be considered

For more detailed guidance then see linked item - unscheduled bleeding whilst women using hormonal contraception


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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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