Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
MDL number:
PubChem Substance ID:
Pricing and availability is not currently available.



Quality Level


ethanol: 1 mg/mL
0.1 M HCl: 30 mg/mL
DMSO: 4.8 mg/mL



SMILES string




InChI key


Gene Information

human ... ADRA1A(148), ADRA2A(150), ADRA2C(152), CHRM1(1128), DRD2(1813), DRD3(1814), DRD4(1815), HRH1(3269), HRH4(59340), HTR2A(3356), HTR2C(3358), HTR3A(3359), HTR3B(9177), HTR3C(170572), HTR3D(200909), HTR3E(285242), HTR6(3362), HTR7(3363), KCNH1(3756), KCNH2(3757), UGT1A4(54657)
rat ... Adra1a(29412), Adra2a(25083), Adrb1(24925), Chrm1(25229), Drd1a(24316), Drd2(24318), Drd3(29238), Drd4(25432), Hrh1(24448), Htr1a(24473), Htr1b(25075), Htr2a(29595), Htr2b(29581), Htr2c(25187), Htr3a(79246), Htr7(65032), Slc6a4(25553)

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25 mg in poly bottle
1 g in glass bottle
100 mg in glass bottle

Biochem/physiol Actions

Atypical antipsychotic compound. Selective antagonist for D4-dopamine receptor. Antagonist at 5-HT2A, 5-HT2C, 5-HT3, 5-HT6, and 5-HT7 serotonin receptors.

Features and Benefits

This compound was developed by Novartis. To browse the list of other pharma-developed compounds and Approved Drugs/Drug Candidates, click here.
This compound is featured on the Histamine Receptors page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.
This compound is also offered as part of Sigma′s Library of Pharmacologically Active Compounds (LOPAC®1280), a biologically annotated collection of high-quality, ready-to-screen compounds. Click here to learn more.

Legal Information

LOPAC is a registered trademark of Sigma-Aldrich Co. LLC


Skull and crossbonesHealth hazard

Signal Word


Hazard Statements


UN 2811 6.1 / PGIII

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

P B Bergqvist et al.
Psychopharmacology, 143(1), 89-96 (1999-05-05)
Low doses of the atypical antipsychotic drug risperidone are effective in patients with obsessive compulsive disorder (OCD) not responding to serotonin (5-HT) reuptake inhibitors, although higher doses have been reported to induce OCD symptoms in psychotic patients. Since such atypical...
Tarek K Rajji et al.
The American journal of psychiatry, 172(6), 579-585 (2015-04-11)
Clozapine's potent antagonism of muscarinic M1 receptors is thought to worsen working memory deficits associated with schizophrenia. In contrast, its major metabolite, N-desmethylclozapine (NDMC), is thought to enhance working memory via its M1 receptor agonist activity. The authors hypothesized that...
Owen Randlett et al.
Current biology : CB, 29(8), 1337-1345 (2019-04-09)
Habituation is a simple form of learning where animals learn to reduce their responses to repeated innocuous stimuli [1]. Habituation is thought to occur via at least two temporally and molecularly distinct mechanisms, which lead to short-term memories that last...
Chun-Hsin Chen et al.
The Journal of clinical psychiatry, 74(5), e424-e430 (2013-06-14)
Many studies have shown that metformin can decrease body weight and improve metabolic abnormalities in patients with schizophrenia. Whether or not the beneficial effects can be sustained after discontinuation of metformin needs to be evaluated. We conducted a 24-week randomized...
A Merenlender-Wagner et al.
Molecular psychiatry, 20(1), 126-132 (2013-12-25)
Autophagy is a process preserving the balance between synthesis, degradation and recycling of cellular components and is therefore essential for neuronal survival and function. Several key proteins govern the autophagy pathway including beclin1 and microtubule associated protein 1 light chain...

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