Catalog No.S1483 Synonyms: HP873

For research use only.

Iloperidone (HP873) is a dopamine (D2)/serotonin (5-HT2) receptor antagonist, used for the treatment of schizophrenia.

Iloperidone Chemical Structure

CAS No. 133454-47-4

Selleck's Iloperidone has been cited by 2 Publications

Purity & Quality Control

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Biological Activity

Description Iloperidone (HP873) is a dopamine (D2)/serotonin (5-HT2) receptor antagonist, used for the treatment of schizophrenia.
5-HT [1]
In vitro

Iloperidone displays high affinity (Ki < 10 nM) for norepinephrine alpha(1)-adrenoceptors, dopamine D(3) and serotonin 5-HT(2A) receptors. [1] Iloperidone displays higher affinity for the dopamine D3 receptor (Ki = 7.1 nM) than for the dopamine D4 receptor (Ki = 25 nM). Iloperidone displays high affinity for the 5-HT6 and 5-HT7 receptors (Ki = 42.7 nM and 21.6 nM, respectively), and is found to have higher affinity for the 5-HT2A (Ki = 5.6 nM) than for the 5-HT2C receptor (Ki = 42.8 nM). [2] Iloperidone significantly increases dopa accumulation, an index of dopamine turnover in response to D2 receptor blockade, at doses from 0.3 mg/kg to 10 mg/kg i.p. in the striatum and from 1 mg/kg to 10 mg/kg in the nucleus accumbens. [3]

In vivo Iloperidone exerts behavioral effects in pharmacological rats models of disrupted sensorimotor gating consistent with "atypical" antipsychotics, mediated by antagonism of dopaminergic and noradrenergic receptors. Iloperidone (1 and 3 mg/kg) prevents the PPI-disruptive effects of treatment with 1 mg/kg PCP. Iloperidone (0.3 mg/kg) prevents cirazoline-induced PPI deficits, independent of its effects on startle magnitude. [4] Iloperidone (10 mg/kg) and Melperone (10 mg/kg) produce an equivalent or a smaller increase in DA release in the nucleus accumbens (NAC) of rats, respectively, compared to the mPFC, whereas none of them increase acetylcholine (ACh) release in the NAC. [5]

Protocol (from reference)

Solubility (25°C)

In vitro

In vivo

Add solvents to the product individually and in order
(Data is from Selleck tests instead of citations):
2% DMSO+40% PEG 300+dd H2O
For best results, use promptly after mixing.


Chemical Information

Molecular Weight 426.48


CAS No. 133454-47-4
Storage 3 years -20°C powder
2 years -80°C in solvent
Smiles CC(=O)C1=CC(=C(C=C1)OCCCN2CCC(CC2)C3=NOC4=C3C=CC(=C4)F)OC

In vivo Formulation Calculator (Clear solution)

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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

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Clinical Trial Information

NCT Number Recruitment Interventions Conditions Sponsor/Collaborators Start Date Phases
NCT04969211 Recruiting Drug: VHX-896 and iloperidone|Drug: Iloperidone and VHX-896 Healthy Vanda Pharmaceuticals June 30 2021 Phase 1
NCT04712734 Recruiting Drug: Iloperidone Schizophrenia Vanda Pharmaceuticals January 13 2021 Phase 1
NCT01495169 Completed Drug: iloperidone (oral tablet) Safety and Tolerability of Iloperidone Vanda Pharmaceuticals October 2011 Phase 1
NCT01291511 Completed Drug: Iloperidone|Drug: Placebo Schizophrenia Vanda Pharmaceuticals February 2011 Phase 3
NCT01529294 Completed Drug: Iloperidone Hepatic Impairment Novartis Pharmaceuticals|Novartis August 2010 Phase 1

(data from, updated on 2022-01-17)

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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