I haven't had any reactions to the sulfate drugs, but I started taking Cranberry Pills (2/day) every morning, which have minimized UTIs. I learned that drinking too much Cranberry Juice can mess up ur Complement 3 or 4 numbers, so be careful.

Thank you both for your answers - iwill talk to my doctor about alternatives

I'm allergic to sulfa meds also. My doctor uses doxycycline for UTIs. It seems to work well. You might need two courses of it because a UTI is sometimes very stubborn to clear up.

Sulfa can trigger lupus flares, and the Johns Hopkins Lupus Center lists it as a drug for us to avoid for this reason. You may want to ask about alternatives, Cathy.

Thanks for that - use with caution I guess