Erythromycin - Can I take erthromycin for a U.T.I?

It will not work. Erythromycin is broken down in the liver and passed out in the faeces. It is unlikely the others like co-trimoxazole (combi. of sulfonamide and trimethoprim) which passes through the kidney, down the urinary tract to take effect! Not only will erythromycin not help, it might have several adverse effects to take note.

Dear speller1:
Suzanne is right, if you are not allergic to Sulfa drugs (Bactrim) they are used for that but if you can get a specimen to the doctor they could possibly check for a bacteria (Colony count) and check it to see what the infection is sensitive to, but please check with your doctor, I hope you feel better soon

I agree with Suzanne66, my son just got over a real serious urinary tract infection and he was not prescribed the above, however he is or was 7 at the time, just turned 8 and what he was given did work but was much stronger than eurythromyacin... Blaze22

Erythromycin is not a drug of choice for treating a UTI. You should see your doctor if you think have a urinary tract infection - self prescribing is unwise.
The drugs prescribed and for how long will depend on your health condition and the type of bacterium found in your urine.
Drugs commonly recommended for simple urinary tract infections include:
Sulfamethoxazole-trimethoprim (Bactrim, Septra, others)
Amoxicillin (Larotid, Moxatag, others)
Nitrofurantoin (Furadantin, Macrodantin, others)
Ampicillin
Ciprofloxacin (Cipro)
Levofloxacin (Levaquin)
https://www.drugs.com/health-guide/urinary-incontinence.html