Can Metronidazole Cause Delayed Menstruation?

Posted on Thu, 4 May 2017

Medically reviewed by Ask A Doctor - 24x7 Medical Review Team

Thu, 4 May 2017 Answered on

Mon, 29 May 2017 Last reviewed on

Question : I took one dose of metronidazole 500mg back in march which caused my period to be 3 days late.i did not get a period at all in April.but I had pms symptoms sore breast and cramps and still have those symptoms a week later.i took a pregnancy test when I first missed my period it was negative. I don't know if the metronidazole is affecting my period 2 months later

Answered by Dr. Vjollce Mbiarra (18 minutes later)

Brief Answer:
Usually, periods have no relation with just a single dose of metronidazole 500 mg

Detailed Answer:
Hi, dear and thanks for your query to HealthcareMagic.

I have read your question carefully and understand your concern.

Metronidazole can cause irregular periods but only when it's taken for a long period of time and not only one dose (which you have done).

Hence Metronidazole doesn't seem to have any relation to your missed period.
Missed period can be due to stress or any other reasons.

If you have such period issue at other times also, please contact your Gynecologist for a thorough evaluation.

Just try to be calm and eat a balanced healthy diet and exercise daily.

Hope I have been helpful and please feel free for any further discussions.

Regards

Above answer was peer-reviewed by : Dr. Arnab Banerjee

Follow up: Dr. Vjollce Mbiarra (6 hours later)

Ok.. my period is now a week late..and I'm still having sore breast and urinating more than usual.the cramps have stop is this normal?

Answered by Dr. Vjollce Mbiarra (16 hours later)

Brief Answer:
Take a pregnancy test at home

Detailed Answer:
Hi dear again!

If you have had unprotected intercourse than take a pregnancy test at home .
If it will be negative than all these signs and symptoms are due to premenstrual syndrome ,hence wait for breakthrough bleeding .

Hope I have been helpful and please feel free for further discussion.

Regards

Above answer was peer-reviewed by : Dr. Raju A.T