Neostigmine Clinical data Trade names Prostigmin, Vagostigmin, other AHFS/Drugs.com Monograph Routes of administration IM, IV, subcutaneous, by mouth ATC code N07AA01 (WHO) S01EB06 (WHO) QA03AB93 (WHO) Legal status Legal status UK: POM (Prescription only) Pharmacokinetic data Bioavailability Unclear, probably less than 5% Metabolism Slow hydrolysis by acetylcholinesterase and also by plasma esterases Onset of action within 30 min (injection), with 4 hrs (by mouth)[1] Biological half-life 50–90 minutes Duration of action up to 4 hrs[1] Excretion Unchanged drug (up to 70%) and alcoholic metabolite (30%) are excreted in the urine Identifiers IUPAC name 3-{[(dimethylamino)carbonyl]oxy}-N,N,N-trimethylbenzenaminium CAS Number 59-99-4 Y PubChem CID 4456 DrugBank DB01400 Y ChemSpider 4301 Y UNII 3982TWQ96G KEGG D08261 Y ChEBI CHEBI:7514 Y ChEMBL CHEMBL54126 N Chemical and physical data Formula C12H19N2O2 Molar mass 223.294 g/mol 3D model (JSmol) Interactive image SMILES O=C(Oc1cccc(c1)[N+](C)(C)C)N(C)C InChI InChI=1S/C12H19N2O2/c1-13(2)12(15)16-11-8-6-7-10(9-11)14(3,4)5/h6-9H,1-5H3/q+1 Y Key:ALWKGYPQUAPLQC-UHFFFAOYSA-N Y NY (what is this?) (verify)