Amoxapine (CL-67772) exerts its antidepressant effect by inhibiting the re-uptake of norepinephrine and, to a lesser degree, of serotonin, at adrenergic nerve endings and blocks the response of dopamine receptors to dopamine. Amoxapine is a tricyclic antidepressant of the dibenzoxazepine class. This drug is used to treat symptoms of depression and may cause tardive dyskinesia. Amoxapine also binds to alpha-adrenergic, histaminergic, and cholinergic receptors which accounts for many of the side effects seen with this agent.

Bitopertin (Paliflutine) (RG1678, RO-4917838) is a potent inhibitor of glycine transporter 1 (GlyT1), with Ki of 8.1 nM for human hGlyT1b and IC50 of 22-25 nM in Chinese hamster ovary cells.

Org 25543 hydrochloride is a potent and selective glycine transporter type 2 (GlyT2) inhibitor (IC50 = 16 nM for hGlyT2). Displays no activity at GlyT1 or 56 other common biological targets (≥ 100 μM), in a glycine uptake assay in CHO cells.

PF-03463275 is an orally active and selective reversible inhibitor of competitive glycine transporter protein-1 (GlyT1) with a Ki of 11.6 nM.PF-03463275 has CNS permeability and may be used to ameliorate cognitive deficits associated with schizophrenia.

ASP2535 is a potent, selective, orally bioavailable, brain-permeable, and centrally-active glycine transporter-1 (GlyT1) inhibitor that can improve cognitive impairment in animal models of schizophrenia and Alzheimer's disease[1].

Opiranserin is a development as an injectable agent for the treatment of postoperative pain. Opiranserin is a non-opioid and non-NSAID analgesic candidate and is a dual antagonist of glycine transporter type 2 (GlyT2) and serotonin receptor 2A (5HT2A) (IC50s: 0.86 and 1.3 μM, respectively). Opiranserin displays antagonistic activity on rP2X3 (IC50=0.87 μM).