What is a serious side effect of trimethoprim sulfamethoxazole?
Bactrim
Medications
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Open Jun 09, 2026 - 01:49 PM
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Jun 09, 2026 - 01:49 PM
A serious side effect of trimethoprim-sulfamethoxazole is severe allergic reactions, such as Stevens-Johnson syndrome or toxic epidermal necrolysis, which can cause skin blistering and peeling. It can also cause blood disorders like agranulocytosis or aplastic anemia. Immediate medical attention is needed if these occur.
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