5-HT3 antagonist 3 (Compound 15b) is a high-affinity 5-HT3 receptor antagonist. It binds to 5-HT3 receptors in rat brain cortical membranes (Ki: 0.25 nM).

5-HT3 antagonist 2 is an antagonist of 5-HT3 receptor.

5-HT3 antagonist 5 is a quinoxalin-2-carboxamide compound which is a 5-HT 3 receptor antagonist. 5-HT3 antagonist 5 exerts antagonism on 5-HT 3 agonist and 2-methyl-5-HT, and exhibits anti-depressant effect in mice [1].

5-HT3 antagonist 1 is a potent and selective antagonist of 5-HT3 receptor.

RS 42358-197 (RS 25259-007) is a competitive 5-HT3 receptor antagonist.

Pancopride（LAS 30451） is a novel, orally available, long-acting, selective 5-HT3 receptor antagonist that blocks nitrogen mustard and dacarbazine-induced vomiting.

Ricasetron (Brl 46470) is a 5-HT3 receptor antagonist with pro-axonal lysis and antiemetic properties, and is used in the study of anxiety and anxiety disorders.

Ramosetron is a serotonin 5-HT3 receptor antagonist for the treatment of nausea and vomiting. It is believed to have higher potency and longer antiemetic action than other 1st generation 5-HT3 antagonists such as ondansetron. Ramosetron is also indicated for a treatment of diarrhea-predominant irritable bowel syndrome in males . It is only licensed for use in Japan and selected Southeast Asian countries.

Litoxetine is a selective 5-HT uptake inhibitor and is a 5-HT3 receptor antagonist. Litoxetine acts as an antidepressant and has shown antiemetic properties in ferrets. Litoxetine (1 and 10 mg/kg i.v.) dose-dependently reduced the number of regurgitations and vomiting and delayed the onset of vomiting. Litoxetine has an affinity for brain 5HT3 receptors (Ki = 85 nM).

Cilansetron is an effective and selective 5-HT3 receptor antagonist that can be used for related diseases caused by colitis.

3-AQC is a competitive antagonist of 5-HT3.

4i (CHEMBL1269981) is a 5-HT3 receptor antagonist,It modulates the serotonergic system.

Tedatioxetine hydrobromide (Lu AA 24530 hydrobromide) is a serotonin-norepinephrine-dopamine reuptake inhibitor and an antagonist of 5-HT2A, 5-HT2C, 5-HT3, and α1A-adrenergic receptors, which can be used to treat depression and anxiety.

Anpirtoline hydrochloride (D-16949 hydrochloride) is a novel and potent 5-HT1B receptor agonist and 5-HT3 receptor antagonist with anti-injurious, analgesic, and antidepressant activity, and is used in the study of movement disorders.

ADR-851 free base (ADR 851 free base) is a 5-HT3 receptor antagonist and a novel antiemetic with analgesic activity.

Alosetron, a 5-HT3 antagonist, is used for the management of severe diarrhea-predominant irritable bowel syndrome (IBS) in women only.

E-3620 is a novel 5-HT3 receptor antagonist that inhibits cisplatin-induced vomiting in beagles. E-3620 can be used to study dyskinesia, gastrointestinal dyskinesia, psoriasis and psoriasis.

Fabesetron (FK1052) is an orally active compound that acts as a dual antagonist, targeting both the 5-HT3 and 5-HT4 receptors. It exhibits efficacy in studying emesis induced by cancer chemotherapy, showing potential for managing both acute and delayed symptoms.

Tropanserin (MDL 72422) is a 5-hydroxytryptamine receptor antagonist that inhibits 5-HT3 receptor activity.Tropanserin has anxiolytic activity and is used to treat depression and cognitive disorders.

Talipexole dihydrochloride (Domnin) is a dopamine D2 receptor agonist, α2-adrenoceptor agonist, and 5-HT3 receptor antagonist in both rat cortical and intestinal membrane fractions with Ki values of 0.35 μM and 0.22 μM, respectively. It displays antiParkinsonian activity.

Metoclopramide hydrochloride hydrate (Metoclopramide monohydrochloride monohydrate) is a dopamine D2 antagonist that is a drug used for digestive dysfunction. It acts as an anti-emetic

Dolasetron (MDL-73147)(MDL-73147) is a serotonin 5-HT3 receptor antagonist. Dolasetron is used to treat nausea and vomiting following chemotherapy.

Metoclopramide hydrochloride (Metoclopramide HCl) is a selective dopamine D2 receptor antagonist, used as an antiemetic.

Tropisetron hydrochloride (Tropisetron HCl) is the hydrochloride salt form of tropisetron, a selective, competitive serotonin 5-hydroxytryptamine type 3 (5-HT3) receptor antagonist, with antinauseant and antiemetic activities.

Alosetron-13C-d3 the 13C and deuterated compound of Alosetron. Alosetron has a CAS number of 122852-42-0. Alosetron, a 5-HT3 antagonist, is used for the management of severe diarrhea-predominant irritable bowel syndrome (IBS) in women only.

Lerisetron is an antagonist of serotonin type 3 (5-HT3) receptor, with antiemetic activity.

MDL-74156 is an active metabolite of dolasetron and a 5-hydroxy-tryptamine3 (5-HT3) antagonist.

Ondansetron-13C-d3 the 13C and deuterated compound of Ondansetron. Ondansetron has a CAS number of 99614-02-5. Ondansetron is a serotonin 5-HT3 receptor antagonist used mainly as an antiemetic.

RG 12915 is a potent, selective 5-HT3 receptor antagonist developed for the treatment of emesis and nausea associated with cancer chemotherapy.

LY 278584 is an antagonist of 5-HT3-receptor.

PU02 (6-[(1-Naphthalenylmethyl)thio]-9H-purine) is a potent and selective antagonist of 5-HT3 receptor.

T 82 is an antagonist of 5-HT3 and inhibitor of acetylcholinesterase (AChE) and used for the treatment of Alzheimer's Disease.

FK1052 hydrochloride is a potent 5-HT3 and 5-HT4 receptor dual antagonist.

Esmirtazapine HCl is the salt form of Esmirtazapine, a potent antagonist of 5-hydroxytryptamine type 2 (5-HT2), 5-HT3, and histamine 1 (H1) receptors, and a moderate antagonist of peripheral alpha 1 adrenergic and muscarinic receptors.

Anpirtoline free base is a highly potent 5-HT1B receptor agonist. Anpirtoline has been shown to decreases central serotonin synthesis and attenuate aggressive behavior in vivo. Anpirtoline also acts as an antagonist at 5-HT3 receptors and can bypass the blood-brain barrier.

Zacopride is a highly potent 5-HT3 receptor antagonist (Kd = 0.38 nM) and 5-HT4 receptor agonist (Ki = 373 nM). It also is a selective IK1 channel agonist.

Bemesetron (MDL 72222) is a selective antagonist of 5-HT3 (IC50 = 0.33 nM) with neuroprotective effects.

(R)-Mirtazapine ((R)-Org3770) is the R(-)-enantiomer of Mirtazapine, which has anti-injury sensory properties in an animal model of acute thermal hyperalgesia. (R)-Mirtazapine is an antagonist of 5-HT3 receptors and a potential analgesic.

Sarizotan (EMD 128130) is an orally active compound that acts as an agonist for serotonin 5-HT 1A receptors and dopamine receptors. It has shown potent activity with IC 50 values of 6.5 nM for rat 5-HT 1A , 0.1 nM for human 5-HT 1A , 15.1 nM for rat D 2 , 17 nM for human D 2 , 6.8 nM for human D 3 , and 2.4 nM for human D 4.2 .

GYKI-46903 is a noncompetitive 5-HT3 receptor antagonist.

Ondansetron hydrochloride dihydrate (GR 38032) is a competitive serotonin type 3 receptor antagonist. It is effective in the treatment of nausea and vomiting caused by cytotoxic chemotherapy drugs, including cisplatin, and has reported anxiolytic and neuroleptic properties.

Alosetron (GR 68755) Hydrochloride (1:X) is a potent and highly selective 5-HT3 receptor antagonist with anti-inflammatory effects. Alosetron Hydrochloride (1:X) can be used in the study of irritable bowel syndrome (IBS).

Arazasetron is an antiemetic which acts as a 5-HT3 receptor antagonist, pKi = 9.27.

Sarpogrelate hydrochloride (MCI-9042) , a selective 5-HT2 antagonist, has been widely used as an anti-platelet agent for the treatment of PAD. Target: 5-HT2 Recepter Sarpogrelate is a drug which acts as an antagonist at the 5HT2A and 5-HT2B receptors. Sarpogrelate hydrochloride was shown to have the same affinity as ritanserin for 5-HT2A receptors, with a Ki value of 8.39 nM. Sarpogrelate hydrochloride lacked prominent 5-HT1-like, 5-HT3, beta, H1, H2 and M3 antagonist activity and weakly blocked alpha 1-adrenoceptors (pKB = 6.30). (S)-M-1 showed weak affinity for 5-HT1-like receptors (pKB = 6.30), alpha 1- (pKB = 6.80) and beta- (pKB = 6.54) adrenoceptors, while (R)-M-1 was a weak antagonist at histamine H1 receptors (pKB = 6.49). After 12 weeks of sarpogrelate administration, FBF and LBF responses during RH showed significant increases from 13.2 +/- 1.7 to 18.1 +/- 2.2 mL/min per 100 mL tissue (P < 0.01) and from 8.2 +/- 0.9 to 14.2 +/- 2.1 mL/min per 100 mL tissue (P < 0.05), respectively. Sarpogrelate hydrochloride -induced augmentation of FBF and LBF responses to RH was maintained at 24 weeks. Long-term oral administration of sarpogrelate improves vascular function in patients with PAD.

PNU-282987 free base is a selective and potent α7 nicotinic acetylcholine receptor (nAChR) agonist and 5-HT3 receptor antagonist with anti-inflammatory activity.PNU-282987 free base protects against sepsis-induced acute lung injury in mice, attenuates activation of ILC2s and Streptozotocin-induced airway inflammation.PNU-282987 free base is used in the study of neurological diseases.

Metoclopramide (5-Chloro-2-methoxyprocainamide) is a dopamine D2 antagonist which has been used for treatment of a variety of gastrointestinal symptoms over the last thirty years. In various countries, metoclopramide is the antiemetic drug of choice in pregnant women. Findings provide reassurance regarding the safety of metoclopramide for the fetus when the drug is given to women to relieve nausea and vomiting during pregnancy. Evidence also supports its use for gastroparesis (poor stomach emptying) and gastroesophageal reflux disease. It appears to bind to dopamine D2 receptors where it is a receptor antagonist, and is also a mixed 5-HT3 receptor antagonist/ 5-HT4 receptor agonist.

Dolasetron Mesylate (MDL-73147EF) is an antagonist of the 5-HT3 receptor and can be used in research on the treatment of vomiting and nausea following chemotherapy.

Alosetron hydrochloride (GR 68755) is the hydrochloride salt form of alosetron, a potent and selective 5-HT3 receptor antagonist. Alosetron blocks the actions of serotonin at 5-HT3 sites in the peripheral nervous system, particularly on enteric and nociceptive sensory neurons, thereby affecting the regulation of visceral pain, decreasing gastrointestinal contraction and motility, and decreasing gastrointestinal secretions.

RS 56812 hydrochloride is a 5-HT3 receptor antagonist and agonist, and may be used in the study of cognitive disorders.

RS 56812 is a 5-HT3 receptor antagonist and agonist used in the study of cognitive disorders.

(R,R)-Palonosetron Hydrochloride is the active enantiomer of Palonosetron

Palonosetron, a 5-HT3 antagonist with Ki of 0.17 nM, is used in the prevention and treatment of chemotherapy-induced nausea and vomiting (CINV).