Echothiophate

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Echothiophate
File:Echothiophate iodide.svg
Systematic (IUPAC) name
2-diethoxyphosphorylsulfanylethyl-trimethyl-ammonium iodide
Clinical data
Routes of
administration
Topical (eye drops)
Identifiers
CAS Number 6736-03-4
ATC code S01EB03 (WHO)
PubChem CID 10547
DrugBank APRD00942
Chemical data
Formula C9H23INO3PS
Molar mass 383.228 g/mol[[Script error: No such module "String".]]
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Echothiophate (Phospholine) is a parasympathomimetic and a phosphorothioate. It is an acetylcholinesterase inhibitor.[1]

Uses

It is used as an ocular antihypertensive in the treatment of chronic glaucoma and, in some cases, accommodative esotropia. It is available under several trade names such as Phospholine Iodide (Wyeth-Ayerst).

Echothiophate binds irreversibly to cholinesterase. Because of the very slow rate at which echothiophate is hydrolyzed by cholinesterase, its effects can last a week or more. Adverse effects include muscle spasm and other systemic effects.

Shortage

Wyeth Pharmaceuticals stopped manufacturing echothiophate iodide in the US in 2003. After contacting the American Academy of Ophthalmology (AAO), Wyeth rescinded their decision and, according to AAO public relations representative Michelle Stephens, the AAO and Wyeth were in talks for about a year about manufacturing it. [2]

In the meantime, a worldwide shortage of the drug has occurred.

References

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  2. Eurotimes article: "Echothiophate iodide shortage leaves US specialists struggling to find alternative for acute cases"