Heavier Periods on an Anticoagulant: A Contact Checklist

If the medicine you take for clot protection is followed by heavier periods, you may feel caught between two worries. Contact the team responsible for the prescription and explain the bleeding. You do not need a complete diary before asking for help.

First: decide whether care is needed immediately

• Seek immediate medical attention for severe or recurrent bleeding, or bleeding you cannot stop. NHS² anticoagulant guidance includes heavy or increased menstrual bleeding among excessive-bleeding signs. Do not wait for a routine review with these concerns.²

Tell the urgent-care service the medicine name and dose. Keep the medication information accessible, but do not delay seeking help to finish this checklist.

For the contact with your anticoagulation team

• Have the current prescription details ready. Bring the medicine name, dose, start date and any changes already directed by a clinician. Include other medicines and the instructions you have received. Ask for advice rather than skipping, reducing or switching doses yourself.

• Describe what changed from your usual period. Newcastle’s leaflet identifies frequent protection changes, flooding, night changes, unusually prolonged bleeding and activities prevented by bleeding as important signs. Tell the team if periods were heavy before the medicine began too.¹

Use actual examples: when you changed protection, what leaked and what you could not do. Mark uncertain dates as estimates. Separate what you noticed from what you think caused it.

• Ask what assessment and options apply to you. Newcastle describes checking iron levels, a clinician prescribing a different anticoagulant, additional period treatment or referral to a heavy-bleeding clinic as possible approaches. These are individualized clinical decisions, not instructions to select a treatment yourself.¹

Explain which concern needs attention first and ask whether another clinician needs to be involved.

Before the conversation ends

• Write down who owns each next step. Confirm who will arrange any blood test or referral, how results will reach you and when the bleeding will be reviewed.

• Confirm the contact plan. Ask whom to call if the bleeding changes, what requires urgent care and what to do about the prescription while awaiting review. Keep the team’s instructions with your medicine list.

Period, Handled includes a Period Scorecard and a Flag It list and visit script. Use them to organize observations and questions alongside your anticoagulation team’s advice. See the book.