Monograph Details
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Eye Disorders
> Glaucoma
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COSOPT |
| Manufacturer |
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Merck & Co., Inc. |
| Legal Classification |
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Rx
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| Pharmacological Class |
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Carbonic anhydrase inhibitor (sulfonamide) + noncardioselective β-blocker. |
| Generic Name |
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Dorzolamide HCl 2%, timolol maleate 0.5%; oph soln; contains benzalkonium chloride. |
| Indications |
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Open-angle glaucoma or ocular hypertension where β-blocker alone is inadequate. |
| Children |
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Not recommended. |
| Adults |
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1 drop twice daily. |
| Contraindications |
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Asthma or history of asthma. Severe COPD. Sinus bradycardia. 2nd- or 3rd-degree AV block. Overt cardiac failure. Cardiogenic shock. |
| Precautions |
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Mild-to-moderate COPD or bronchospastic disease, or severe renal impairment: not recommended. Hepatic impairment. Surgery. May mask hypoglycemia or thyrotoxicosis. Myasthenia gravis. Discontinue if ocular effects occur. Soft contact lenses (remove, may reinsert 15 minutes after instillation). Discontinue at 1st sign of cardiac failure. Pregnancy (Cat.C). Nursing mothers: not recommended. |
| Interactions |
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Concomitant oral carbonic anhydrase inhibitors or other topical β-blockers: not recommended. May potentiate systemic β-blockers, reserpine, hypoglycemic agents, and mydriatic effects of topical epinephrine. May be potentiated by quinidine. May inhibit renal excretion of basic drugs and promote excretion of acidic drugs. May increase salicylate toxicity (acidosis). Possible conduction defects, left ventricular failure, or hypotension with calcium channel blockers, digoxin. May block epinephrine. |
| Adverse Reactions |
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Taste perversion; ocular burning, stinging, or itching; conjunctival hyperemia, blurred vision, superficial punctate keratitis; possible systemic effects. |
| How Supplied |
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Soln—10mL |
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