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Is Inter Menstrual Bleeding Normal While On Trimethoprim?
21 years old, 5 5 , 62kg, asthmatic. currently taking trimethoprim for a UTI. history of recurring UTIs. i have started having small amounts of intermenstrual bleeding after being on trimethoprim for a couple of days. is this normal? the amount of blood seems to have increased over the past two days.
Wed, 17 Mar 2021
Hi,
There is no documented relationship between trimethoprim and inter-menstrual bleeding. However any infection/inflammation of cervix or vagina, may also cause inter-menstrual bleeding. Episodes of recurrent UTI in your case might also have caused an infection of vagina or cervix and hence bleeding.
Some times use of trimethoprim may cause a change in bacterial environment of cervix and vagina due to its action on beneficial bacteria also, thus causing inflammation of vaginal or cervical region and hence inter-menstrual bleeding. Besides this ,other normal causes like use of hormonal contraceptives may be also taken into consideration.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Satnarain Bansal, General & Family Physician
There is no documented relationship between trimethoprim and inter-menstrual bleeding. However any infection/inflammation of cervix or vagina, may also cause inter-menstrual bleeding. Episodes of recurrent UTI in your case might also have caused an infection of vagina or cervix and hence bleeding.
Some times use of trimethoprim may cause a change in bacterial environment of cervix and vagina due to its action on beneficial bacteria also, thus causing inflammation of vaginal or cervical region and hence inter-menstrual bleeding. Besides this ,other normal causes like use of hormonal contraceptives may be also taken into consideration.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Satnarain Bansal, General & Family Physician
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