Cosopt (Dorzolamide Hydrochloride-Timolol Maleate Ophthalmic Solution) Drug Information: Overdosage and Contraindications

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May 27, 2012

Cosopt

Glaucoma »

What is glaucoma?

Glaucoma is a disease of the major nerve of vision, called the optic nerve. The optic nerve receives light-generated nerve impulses from the retina and transmits these to the brain, where we recognize those electrical signals as vision. Glaucoma is characterized by a particular pattern of progressive damage to the optic nerve that generally begins with a subtle loss of side vision (peripheral vision). If glaucoma is not diagnosed and treated, it can progress to loss of central vision and blindness.

Glaucoma is usually, but not always, associated with elevated pressure in the eye (intraocular pressure). Generally, it is this elevated eye pressure that leads to damage of the eye (optic) nerve. In some cases, glaucoma may occur in the presence of normal eye pressure. This form of glaucoma is believed to be caused by poor regulation of blood flow to the optic nerve.

How common is glaucoma?

Worldwide, glaucoma...

Read the Glaucoma article »

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OVERDOSE

There are no human data available on overdosage with COSOPT (dorzolamide hydrochloride-timolol maleate ophthalmic solution) .

Symptoms consistent with systemic administration of beta-blockers or carbonic anhydrase inhibitors may occur, including electrolyte imbalance, development of an acidotic state, dizziness, headache, shortness of breath, bradycardia, bronchospasm, cardiac arrest and possible central nervous system effects. Serum electrolyte levels (particularly potassium) and blood pH levels should be monitored (see also ADVERSE REACTIONS).

A study of patients with renal failure showed that timolol did not dialyze readily.

CONTRAINDICATIONS

COSOPT (dorzolamide hydrochloride-timolol maleate ophthalmic solution) is contraindicated in patients with (1) bronchial asthma; (2) a history of bronchial asthma; (3) severe chronic obstructive pulmonary disease (see WARNINGS); (4) sinus bradycardia; (5) second or third degree atrioventricular block; (6) overt cardiac failure (see WARNINGS); (7) cardiogenic shock; or (8) hypersensitivity to any component of this product.

Last reviewed on RxList: 7/20/2010
This monograph has been modified to include the generic and brand name in many instances.