Homatropine methylbromide  (Synonyms: Homatropine methobromide)

Homatropine methylbromide (Homatropine methobromide) is muscarinic AChR antagonist, inhibits endothelial and smooth muscle muscarinic receptors of WKY-E and SHR-E with IC₅₀ of 162.5 nM and 170.3 nM, respectively.

IC50: WKY-E (162.5 nM), SHR-E (170.4 nM)

Homatropine methylbromide (Homatropine methobromide) (20 μM) alone produces a dose ratio of 259 in atrium from guinea-pigs. Homatropine methylbromide (Homatropine methobromide) (20 μM) produces a dose ratio of only 95.0 when combined with hexamethonium in atrium from guinea-pigs.

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Pre-treatment with Homatropine methylbromide (Homatropine methobromide) (20 mg/kg) was comparable with atropine (10 mg/kg) in preventing lethality in this rat model of acute OC poisoning.

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

370.28

Solid

C₁₇H₂₄BrNO₃

80-49-9

C[N+]1([[email protected]@H]2C[[email protected]@H](OC(C(O)C3=CC=CC=C3)=O)C[[email protected]]1CC2)C.[Br-]

Room temperature in continental US; may vary elsewhere.

4°C, sealed storage, away from moisture

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

• [1]. Sim MK et al. Muscarinic receptors in the aortae of normo- and hypertensive rats: a binding study. Clin Exp Hypertens. 1993 Mar;15(2):409-21.  [Content Brief]

  [2]. Bryant SM et al. Intramuscular ophthalmic homatropine vs. atropine to prevent lethality in rates with dichlorvos poisoning. J Med Toxicol. 2006 Dec;2(4):156-9.  [Content Brief]

  [3]. Leung E et al. Modification by hexamethonium of the muscarinic receptors blocking activity of pancuronium and homatropine in isolated tissues of the guinea-pig. Eur J Pharmacol. 1982 May 7;80(1):11-7.  [Content Brief]