Head-to-head comparisons of medication uses, side effects, warnings, and more.
Key takeaways
Simbrinza (brinzolamide/brimonidine) and dorzolamide are both used to lower pressure in the eye caused by open-angle glaucoma or ocular hypertension (high eye pressure). But they have several differences. Simbrinza is a combination of two medications: brinzolamide, a carbonic anhydrase inhibitor, and brimonidine, an alpha-2 agonist. Dorzolamide, on the other hand, is a single medication that is also a carbonic anhydrase inhibitor. Simbrinza is only available as a brand medication, making it potentially more expensive, while dorzolamide is available in a lower cost generic form. Both medications are used 3 times a day and can cause similar side effects like eye irritation. However, Simbrinza combines two medications into one drop, which can be more convenient than using multiple separate drops.
Summary for Carbonic anhydrase inhibitor / Alpha agonist
Prescription only
Simbrinza is a combination eye drop containing two medications: brinzolamide (a carbonic anhydrase inhibitor) and brimonidine (an alpha-2 agonist). It's used to treat glaucoma and high pressure in the eye. The dosage for the eye drops is placed 1 drop placed directly into the eye(s) three times per day to lower the pressure in the eye. Simbrinza is not yet available as a lower-cost generic. Side effects include eye irritation, blurry vision, and changes in taste.
Summary for Carbonic anhydrase inhibitor
Prescription only
Dorzolamide is an eye drop medication used to treat high pressure in the eye in people with glaucoma or ocular hypertension. The dosage is 1 drop applied directly into the affected eye(s) three times per day. It's available as a generic only as the brand-name medication Trusopt has been discontinued. Dorzolamide is a sulfa medication, so it might not be the best choice if you have a serious sulfa allergy. Side effects include burning or stinging in the eye and a bitter taste in the mouth.
Indications of Simbrinza vs. Trusopt
Indications for
Treatment of high pressure in the eye in people ages 2 years and older with: