Oxybutynin is also a possible treatment of hyperhidrosis (hyper-active sweating) .

Oxybenzone is a benzophenone derivative used as a sunscreen agent.

Oxonic acid potassium salt is an inhibitor of uricase, oxonic inhibits the phosphorylation of 5-FU to 5-fluorouridine-5'-monophosphate catalyzed by pyrimidine phosphoribosyl-transferase in a different manner from allopurinol in cell-free extracts and inta

Oxibendazole

Oxfendazole

Oxadiazon is a preemergent herbicide.

OX-14 is a highly potent farnesyl pyrophosphate synthase (FPPS) inhibitor with IC50 of 2.46 nM, with significantly lower binding affinity to hydroxyapatite.

o-vanillin (C29L.

OUP-16 is a potent H4R agonist with a considerable selectivity over H3R..

Otilonium Bromide is an antimuscarinic used as a spasmolytic agent.

OSMI-4 (OGT inhibitor 4b) is a novel potent, selective, cell-active O-linked N-acetylglucosamine transferase (OGT) inhibitor with EC50 of ~3 uM.

Orvepitant (GW823296) is a potent and selective, brain penetrant NK1 receptor antagonist with pKi of 10.2.

Orotic acid (6-Carboxyuracil)

ORM-10962 is a potent, highly selective sodium-calcium exchanger (NCX) inhibitor, significantly reduces inward/outward NCX currents with IC50 of 55 and 67 nM, respectively.

Orita-13 is potent inhibitor of Migration inhibitory factor (MIF) tautomerase activity with Ki of 17 uM..

Org 42599 is a cell-permeant, allosterically binding, small-molecule agonist of luteinizing hormone (LH) receptor that rescues the folding and cell surface expression mutant mutant human LH receptors A593P and S616Y (EC50=70.8 nM)..

Org 42599 is a cell-permeant, allosterically binding, small-molecule agonist of luteinizing hormone (LH) receptor that rescues the folding and cell surface expression mutant mutant human LH receptors A593P and S616Y (EC50=70.8 nM)..

ONO-DI 004 is a potent, selective EP1 agonist..

ONO-9910539 is a potent LPA1 inhibitor with IC50 of 22 nM..

ONO-9780307 is a potent LPA1 inhibitor with IC50 of 27 nM..

ONO-6126 is a potent and selective PDE4 inhibitor for the treatment of bronchial asthma and allergic conjunctivitis..

ONO-3080573 is a potent LPA1 inhibitor with IC50 of 11 nM..

ON108110 (ON-108110, ON 108110) is a novel multi-kinase inhibitor of protein kinase CK2 (CK2α1/2, IC50=3/2 nM) as well as CDK4/6 (IC50=2-24 nM).

ON 146040 is a potent, dual PI3K/BCR-ABL inhibitor with IC50 of 14/20 nM for PI3Kα/δ , IC50 of 20 nM for BCR/ABL.

Omeprazole(Prilosec) is a proton pump inhibitor used in the treatment of dyspepsia.

Ombitasvir is an orally bioavailable and potent inhibitor of the hepatitis C virus (HCV) non-structural protein 5A (NS5A).

Olumacostat glasaretil is a small molecule inhibitor of acetyl coenzyme A carboxylase (ACC).

Olopatadine Hydrochloride

Oleuropein is an antioxidant polyphenol isolated from olive leaf.

Oleamide is an endogenous fatty acid amide which can be synthesized de novo in the mammalian nervous system, and has been detected in human plasma.