If I am allergic to Bactrim, (sulfamethoxazole and trimethoprim) can I take cephalexin for strep throat?

Yes. it should be fine. as long as you are not allergic to penicillins or cephalosporins taking cephalexin is ok. good luck.
Usually yes. Bactrim (sulfamethoxazole and trimethoprim) and cephalexin don't share any cross-reactive features. However, people with drug allergy, might be more prone for drug allergies in general. I'm not sure Bactrim (sulfamethoxazole and trimethoprim) or cephalexin are the best treatments for strep throat. Penicillin V is usually the best antibiotic for step throat. Better cephalosporins than cephalexin might be cefuroxime, cefpodoxime, cefdinir, ceftriaxone.

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Can bactrim (sulfamethoxazole and trimethoprim) work for strep throat and or sinus infections?

Yes and No. Not for strep throat. It could work some sinus infections. But, it depends on what bacteria caused the infection. Amoxil (amoxicillin) or one of the penicillins would be for strep and would help a lot of sinus infections. Read more...

Currently on Bactrim (sulfamethoxazole and trimethoprim) and Cephalexin for a skin infection. Added Advil for pain but it still hurts too much. Anything stronger I can take?

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