dorzolamide vs timolol
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Side-by-side comparison of dorzolamide and timolol. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
moderate Known Drug Interaction
7 DRUG INTERACTIONS Potential additive effect of oral carbonic anhydrase inhibitor with dorzolamide hydrochloride and timolol maleate ophthalmic solution. ( 7.7 ) 7.1 Oral Carbonic Anhydrase Inhibitors There is a potential for an additive effect on the known systemic effects of carbonic anhydrase inhibition in patients receiving an oral carbonic anhydrase inhibitor and dorzolamide hydrochloride and timolol maleate ophthalmic solution. The concomitant administration of dorzolamide hydrochloride and timolol maleate ophthalmic solution and oral carbonic anhydrase inhibitors is not recommended.
Trusopt
Timoptic
Dorzolamide eye drops help lower pressure in the eye. It is used for people with ocular hypertension or open-angle glaucoma.
No summary available.
This medicine treats high pressure inside your eye. It is for people who have ocular hypertension or open-angle glaucoma. Dorzolamide helps to lower the pressure and prevent damage to your optic nerve.
Information not available.
Dorzolamide is a type of medicine called a carbonic anhydrase inhibitor. It works by decreasing the amount of fluid your eye makes. This lowers the pressure inside your eye.
Information not available.
- • Burning, stinging, or discomfort in the eye right after using the drops
- • Bitter taste in your mouth
- • Superficial punctate keratitis (small spots on the surface of the eye)
- • Signs and symptoms of an allergic reaction in the eye
- • Bitter, sour, or unusual taste
- • Eye burning or stinging
- • Redness of the eye
- • Blurred vision
- • Eye itching
- Treatment Failure 1,369
- Fatigue 444
- Headache 356
- Pain 321
- Eye Pain 292
- Treatment Failure 3,042
- Fatigue 470
- Hypersensitivity 456
- Dizziness 401
- Diarrhoea 396
Dorzolamide contains a sulfonamide. Rarely, severe reactions to sulfonamides have happened, even death. If you have signs of a serious reaction or allergy, stop using this medicine right away.
No specific warnings noted.
It is not known if dorzolamide is safe to use during pregnancy. Talk to your doctor if you are pregnant or plan to become pregnant. It is also not known if dorzolamide passes into breast milk.
No pregnancy information available.
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How to Read This dorzolamide vs timolol Comparison
dorzolamide is classified in the Carbonic Anhydrase Inhibitor (Ophthalmic) drug class, while timolol sits within the Beta-Blocker (Ophthalmic) class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, dorzolamide has 2,782 submissions while timolol has 4,765. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known moderate interaction flagged in FDA labeling, attributed to using these drugs together can cause their effects to stack up, which may lead to more side effects throughout your body.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for dorzolamide or timolol.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.