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Echothiophate iodide
Systematic (IUPAC) name
2-diethoxyphosphorylsulfanylethyl-trimethyl-ammonium iodide
CAS number 6736-03-4
ATC code S01EB03
PubChem 10547
DrugBank APRD00942
Chemical data
Formula C9H23INO3PS 
Mol. mass 383.228 g/mol
Pharmacokinetic data
Bioavailability  ?
Metabolism  ?
Half life  ?
Excretion  ?
Therapeutic considerations
Pregnancy cat.


Legal status
Routes  ?

Echothiophate is a parasympathomimetic and organophosphate which 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.

Clinical uses

Echothiophate is used as ocular drops 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).


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 After contacting the American Academy of Ophthalmology (AAO), Wyeth rescinded their decision and, according to AAO public relations representative Michelle Stephens, the AAO and Wyeth were in talks for about a year about manufacturing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

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


  • Brenner, G. M. (2000). Pharmacology. Philadelphia, PA: W.B. Saunders Company. ISBN 0-7216-7757-6
  • Canadian Pharmacists Association (2000). Compendium of Pharmaceuticals and Specialties (25th ed.). Toronto, ON: Webcom. ISBN 0-919115-76-4
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Echothiophate". A list of authors is available in Wikipedia.
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