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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Diagnosed With UTI, Had Blood In Urine With Painful Micturation On Taking Alrpim. What Is The Cause?

i have a UTI and today i bought the prescibed medication from my doctor it was alprim.... i took it at 11am and about 1.pm i went to the toliet and peed, there was abit of blood and peeing became more painful than before. i heard that, if you are suffering more pains while taking alprim you need to stop, but i also heard that you may be allergic (im not allergic to anything), and you may be pregnant.. (i had sex 4 days before) ... will aprim work straight away or it will take time.. i onl started taking it today am im already worried
Fri, 17 May 2013
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Pathologist and Microbiologist,  's  Response
Hello,

One of the commonest side effect of Trimethoprim is Thrombocytopenia(decreased platelet count).
Decrease in the platelet causes bleeding.
Stop trimethoprim and do a blood count to check for platelet count.
If they are critically low than platelet transfusion is need.
If the counts are within the normal limits than go for another group of antibiotics for treatment of UTI.
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Diagnosed With UTI, Had Blood In Urine With Painful Micturation On Taking Alrpim. What Is The Cause?

Hello, One of the commonest side effect of Trimethoprim is Thrombocytopenia(decreased platelet count). Decrease in the platelet causes bleeding. Stop trimethoprim and do a blood count to check for platelet count. If they are critically low than platelet transfusion is need. If the counts are within the normal limits than go for another group of antibiotics for treatment of UTI.