Key takeaways
Polytrim (polymyxin B / trimethoprim) and Blephamide (sulfacetamide / prednisolone) are both prescription eye medications used to treat bacterial eye infections, but they have some key differences. Polytrim is a combination of two antibiotics, polymyxin B and trimethoprim, and is used specifically for mild-to-moderate bacterial eye infections like pink eye. It is available as a lower-cost generic and is typically applied every 3 hours for 7 to 10 days. Common side effects include eye irritation such as redness, stinging, and itching. On the other hand, Blephamide combines an antibiotic, sulfacetamide, with a corticosteroid, prednisolone, to treat or prevent inflammation and bacterial infections. It comes in both eye drop and ointment forms and must be used multiple times a day. Blephamide can cause high eye pressure and eye injury if used for a long time, and it may trigger allergic reactions in people with sulfa allergies. While both medications are effective for bacterial eye infections, Blephamide also addresses inflammation, making it suitable for more complex cases involving both infection and inflammation.
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