2 doctors weighed in:
Bactrim (sulfamethoxazole and trimethoprim) allergy - timing and symptoms?
2 doctors weighed in

Dr. Paul Carter
Internal Medicine - Allergy & Immunology
1 doctor agrees
In brief: Rash.
Most common side effect or allergy to Bactrim (sulfamethoxazole and trimethoprim) is a rash.
Often occurs a few days into the course of treatment, but may occur within a few hours of first dose especially if due to a true allergy to bactrim (sulfamethoxazole and trimethoprim).

In brief: Rash.
Most common side effect or allergy to Bactrim (sulfamethoxazole and trimethoprim) is a rash.
Often occurs a few days into the course of treatment, but may occur within a few hours of first dose especially if due to a true allergy to bactrim (sulfamethoxazole and trimethoprim).
Dr. Paul Carter
Dr. Paul Carter
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