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5.08162

Sigma-Aldrich

Loperamide Hydrochloride

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Synonym(s):
Loperamide Hydrochloride, µ-Opioid Receptor Agonist, Loperamide Hydrochloride, Imodium
Empirical Formula (Hill Notation):
C29H33ClN2O2 · xHCl
CAS Number:
34552-83-5
Molecular Weight:
477.04 (free base basis)
MDL number:
MFCD00058581

Assay

≥99% (HPLC)

Quality Level

100

form

solid

potency

2 nM Ki

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze
protect from light

color

white

solubility

DMSO: 50 mM
ethanol: 50 mM

storage temp.

2-8°C

InChI

1S/C29H33ClN2O2.ClH/c1-31(2)27(33)29(24-9-5-3-6-10-24,25-11-7-4-8-12-25)19-22-32-20-17-28(34,18-21-32)23-13-15-26(30)16-14-23;/h3-16,34H,17-22H2,1-2H3;1H

InChI key

PGYPOBZJRVSMDS-UHFFFAOYSA-N

General description

A very potent and highly selective peripheral resctricted µ-opioid receptor agonist (Ki = 2 nM). Often used as an antidiarrheal, antipruritic, and antihyperalgesic agent. In addition, shown to improve defective post-receptor insulin signaling in skeletal muscle cells and enhance insulin sensitivity in rats.

Biochem/physiol Actions

Primary Target
u opioid receptor

Warning

Toxicity: Toxic (F)

Preparation Note

Warming is required for complete solubilization in ethanol.

Reconstitution

Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 3 months at -20°C.

Other Notes

Cheng, K., et al. 2013. Pharmaco. Ther.139, 334.
Di Bosco, M., et al. 2008. Chem. Biol. Drug Des.71, 328.
DeHaven-Hudkins, D., et al. 1999. J. Pharmacol. Exp. Ther.289, 494.
Mackerer, C., et al. 1976. J. Pharmacol. Exp. Ther.199, 131.
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Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Pictograms

Skull and crossbones
GHS06

Signal Word

Danger

Hazard Statements

H301

Hazard Classifications

Acute Tox. 3 Oral

Storage Class Code

6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

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Antonio Mazzella di Bosco et al.
Chemical biology & drug design, 71(4), 328-335 (2008-02-21)
Loperamide is a piperidine analogue, acting as agonist on peripheral opioid receptors, exhibiting affinity and selectivity for the cloned mu human opioid receptor compared with the delta human opioid receptor. Automatic docking studies of loperamide, using AutoDock, on human mu-
C R Mackerer et al.
The Journal of pharmacology and experimental therapeutics, 199(1), 131-140 (1976-10-01)
Loperamide, a new antidiarrheal agent, was tested to determine whether its biological activity involves binding to opiate receptor sites. Loperamide and morphine competitively inhibited 3H-naloxone binding to homogenates a guinea-pig brain and myenteric plexus. The Kp values obtain in the
D L DeHaven-Hudkins et al.
The Journal of pharmacology and experimental therapeutics, 289(1), 494-502 (1999-03-23)
The antihyperalgesic properties of the opiate antidiarrheal agent loperamide (ADL 2-1294) were investigated in a variety of inflammatory pain models in rodents. Loperamide exhibited potent affinity and selectivity for the cloned micro (Ki = 3 nM) compared with the delta
Kai-Chun Cheng et al.
Pharmacology & therapeutics, 139(3), 334-340 (2013-05-22)
Type-2 diabetes is one of the fastest growing public health problems worldwide resulting from both environmental and genetic factors. Activation of μ-opioid receptor (MOR) could result in reversal of the impairment of insulin-stimulated glucose disposal in genetically obese Zucker rats

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