Loperamide HCl

Catalog No.S2480 Synonyms: ADL 2-1294

For research use only.

Loperamide HCl (ADL 2-1294) is a selective μ-opioid receptor agonist opioid with Ki of 3.3 nM, 15-fold and 350-fold selective over the δ subtype and the κ subtype of the opioid receptor, used against diarrhea resulting from gastroenteritis or inflammatory bowel disease.

Loperamide HCl Chemical Structure

CAS No. 34552-83-5

Selleck's Loperamide HCl has been cited by 5 Publications

2 Customer Reviews

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Biological Activity

Description Loperamide HCl (ADL 2-1294) is a selective μ-opioid receptor agonist opioid with Ki of 3.3 nM, 15-fold and 350-fold selective over the δ subtype and the κ subtype of the opioid receptor, used against diarrhea resulting from gastroenteritis or inflammatory bowel disease.
Targets
μ-opioid receptor [1]
()
δ-opioid receptor [1]
3.3 nM(Ki) 48 nM(Ki)
In vitro

Loperamide exhibits potent affinity and selectivity for the cloned micro (Ki = 3 nM) compared with the delta (Ki = 48 nM) and kappa (Ki = 1156 nM) human opioid receptors. Loperamide potently stimulates [35S]guanosine-5'-O-(3-thio)triphosphate binding with EC50 of 56 nM, and inhibits forskolin-stimulated cAMP accumulation (IC50 = 25 nM) in Chinese hamster ovary cells transfected with the human mu opioid receptor. Loperamide potently inhibits late-phase formalin-induced flinching after intrapaw injection (A50 = 6 mg). [1] Loperamide is a strong inhibitor of CES2, with a K(i) of 1.5 muM, but it only weakly inhibits CES1A1 (IC50 = 0.44 mM). [2] Loperamide reversibly blocks rises in [Ca2+]i evoked by high [K+] in a concentration-dependent manner, with an IC50 of 0.9 mM. Loperamide (0.1-50 mM) produces a concentration-dependent reduction of the peak IBa with an IC50 value of 2.5 mM and, at the highest concentration tested, could fully block IBa in the absence of any other pharmacological agent. Loperamide also attenuates NMDA-evoked currents recorded at a membrane potential of -60 mV, with an IC50 of 73 mM. [3]

In vivo Loperamide, an opioid agonist unable to cross the blood-brain barrier, inhibits both thermal and mechanical hyperalgesia when s.c. injected, locally over the tibial tumoral mass (7.5-75 mg) or distantly, under the fur of the neck (4 mg/kg) in mice. [4]

Protocol (from reference)

Solubility (25°C)

In vitro

DMSO 22 mg/mL
(42.84 mM)
Ethanol 4 mg/mL
(7.78 mM)
Water Insoluble

In vivo

Add solvents to the product individually and in order
(Data is from Selleck tests instead of citations):
2% DMSO+30% PEG 300+H2O
For best results, use promptly after mixing.

2.5mg/mL

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 513.5
Formula

C29H33ClN2O2.HCl

CAS No. 34552-83-5
Storage 3 years -20°C powder
2 years -80°C in solvent
Smiles CN(C)C(=O)C(CCN1CCC(CC1)(C2=CC=C(C=C2)Cl)O)(C3=CC=CC=C3)C4=CC=CC=C4.Cl

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

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Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )

Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Molarity Calculator

Mass Concentration Volume Molecular Weight

Clinical Trial Information

NCT Number Recruitment Interventions Conditions Sponsor/Collaborators Start Date Phases
NCT04225078 Recruiting Drug: Loperamide|Other: Placebo|Drug: Moxifloxacin Healthy Participants Janssen Research & Development LLC January 17 2020 Phase 1
NCT03489265 Withdrawn Drug: Eluxadoline 100 mg|Other: Placebo Fecal Incontinence|Accidental Bowel Leakage|Anal Incontinence|Diarrhea|Urge Incontinence University of North Carolina Chapel Hill|Allergan April 2019 Phase 2
NCT02677844 Completed Drug: Abemaciclib|Drug: Placebo|Drug: Loperamide Healthy Eli Lilly and Company February 2016 Phase 1
NCT02628626 Recruiting Drug: Colesevelam|Drug: Clonidine|Other: Placebo Fecal Incontinence|Bile Acid Malabsorption Mayo Clinic November 2015 Phase 3

(data from https://clinicaltrials.gov, updated on 2021-09-06)

Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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