A 42-year-old member asked:
What are the side effects of sulfamethoxazole-tmp--am i allergic to cephalexin?
1 doctor answer • 1 doctor weighed in
Dr. Martin Raffanswered
Infectious Disease 58 years experience
Allergenic: Tmp (bactrim, septra, (sulfamethoxazole and trimethoprim) etc.) has a sulfonamide as one component. These are among the most allergy creating drugs known and anyone who is developing an allergy to other classes of drugs, like cephalosporins, has a higher risk of also being allergic to sulfa. Be careful !
Created for people with ongoing healthcare needs but benefits everyone.
5.9k viewsAnswered >2 years ago
Last updated Apr 20, 2013
People also asked
Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
24/7 visits - just $44!
50% off with $15/month membership
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.