Demecarium bromide

Demecarium bromide

Chemical structure of Demecarium bromide

Demecarium bromide is a cholinesterase inhibitor used primarily in the management of glaucoma and other ocular conditions. It is a quaternary ammonium compound that acts by inhibiting the enzyme acetylcholinesterase, leading to increased levels of acetylcholine in the eye. This results in prolonged miosis and reduced intraocular pressure.

Mechanism of action

Demecarium bromide functions by inhibiting the breakdown of acetylcholine, a neurotransmitter involved in the contraction of the ciliary muscle of the eye. By preventing the degradation of acetylcholine, demecarium bromide enhances the outflow of aqueous humor through the trabecular meshwork, thereby lowering intraocular pressure. This mechanism is particularly beneficial in the treatment of open-angle glaucoma.

Clinical uses

Demecarium bromide is primarily indicated for the treatment of chronic open-angle glaucoma and secondary glaucoma. It is also used in the management of accommodative esotropia, a condition where the eyes turn inward due to excessive accommodation. The drug is administered as an ophthalmic solution, typically in concentrations ranging from 0.125% to 0.25%.

Side effects

Common side effects of demecarium bromide include ocular irritation, conjunctival hyperemia, and lacrimation. Prolonged use may lead to cataract formation and retinal detachment. Systemic absorption can result in cholinergic crisis, characterized by symptoms such as bradycardia, hypotension, and respiratory depression.

Contraindications

Demecarium bromide is contraindicated in patients with narrow-angle glaucoma, iritis, or uveitis. It should be used with caution in individuals with a history of asthma, epilepsy, or cardiovascular disease.

Related pages

• Glaucoma
• Cholinesterase inhibitor
• Acetylcholine
• Ophthalmology