| 1 | 
                
                    Obeticholic acid
                
            
 💬 | [1]  Obeticholic acid Obeticholic acid | [4]  6-ECDCA 6-ECDCA; 6-ethylchenodeoxycholic acid; OBETICHOLIC ACID; Ocaliva | [1]  NR1H4 NR1H4 💬
 | [1]  Bile secretion Bile secretion 💬 | [3]  93 93, 265, 296 💬
 | 
| 2 | 
                
                    Obexelimab
                
            
 💬 | [1]  Obexelimab Obexelimab | [1]  Obexelimab Obexelimab | [1]  CD19 CD19 💬
 | [5]  B cell receptor signaling pathway B cell receptor signaling pathway, Epstein-Barr virus infection, Hematopoietic cell lineage, PI3K-Akt signaling pathway, Primary immunodeficiency 💬 | [1]  300 300 💬
 | 
| 3 | 
                
                    Obinutuzumab
                
            
 💬 | [1]  Obinutuzumab Obinutuzumab | [2]  GAZYVARO GAZYVARO; Obinutuzumab | [1]  MS4A1 MS4A1 💬
 | [1]  Hematopoietic cell lineage Hematopoietic cell lineage 💬 | [4]  43 43, 44, 49, 222 💬
 | 
| 4 | 
                
                    Ocrelizumab
                
            
 💬 | [1]  Ocrelizumab Ocrelizumab | [3]  Ocrelizumab Ocrelizumab; OCREVUS; RhuMAb 2H7 | [1]  MS4A1 MS4A1 💬
 | [1]  Hematopoietic cell lineage Hematopoietic cell lineage 💬 | [3]  13 13, 46, 49 💬
 | 
| 5 | 
                
                    Octreotide
                
            
 💬 | [1]  Octreotide Octreotide | [3]  Octreotide Octreotide; OCTREOTIDE ACETATE; Sandostatin LAR | [1]  SSTR2 SSTR2 💬
 | [4]  Gastric acid secretion Gastric acid secretion, Growth hormone synthesis, secretion and action, Neuroactive ligand-receptor interaction, cAMP signaling pathway 💬 | [7]  67 67, 75, 84, 85, 89, 193, 227 💬
 | 
| 6 | 
                
                    Odevixibat
                
            
 💬 | [1]  Odevixibat Odevixibat | [1]  Odevixibat Odevixibat | [1]  SLC10A2 SLC10A2 💬
 | [1]  Bile secretion Bile secretion 💬 | [3]  296 296, 297, 338 💬
 | 
| 7 | 
                
                    Ofatumumab
                
            
 💬 | [1]  Ofatumumab Ofatumumab | [4]  Arzerra Arzerra; HuMax-CD20; Kesimpta; Ofatumumab | [1]  MS4A1 MS4A1 💬
 | [1]  Hematopoietic cell lineage Hematopoietic cell lineage 💬 | [3]  13 13, 35, 46 💬
 | 
| 8 | 
                
                    Olanzapine
                
            
 💬 | [1]  Olanzapine Olanzapine | [2]  Olanzapine Olanzapine; Zyprexa | [11]  ADRA1A ADRA1A, ADRA1B, ADRA1D, DRD2, DRD3, DRD4, HRH1, HTR2A, HTR2B, HTR2C, HTR6 💬
 | [16]  AMPK signaling pathway AMPK signaling pathway, Adrenergic signaling in cardiomyocytes, Alcoholism, Calcium signaling pathway, Cocaine addiction, Dopaminergic synapse, Gap junction, Inflammatory mediator regulation of TRP channels, Neuroactive ligand-receptor interaction, Parkinson disease, Rap1 signaling pathway, Salivary secretion, Serotonergic synapse, Vascular smooth muscle contraction, cAMP signaling pathway, cGMP-PKG signaling pathway 💬 | [2]  2 2, 8 💬
 | 
| 9 | 
                
                    Olaparib
                
            
 💬 | [1]  Olaparib Olaparib | [1]  Olaparib Olaparib | [2]  PARP1 PARP1, PARP2 💬
 | [5]  Apoptosis Apoptosis, Base excision repair, Diabetic cardiomyopathy, NF-kappa B signaling pathway, Necroptosis 💬 | [2]  86 86, 285 💬
 | 
| 10 | 
                
                    Oleic acid
                
            
 💬 | [1]  Oleic Acid Oleic Acid | [1]  Oleic Acid Oleic Acid | - | - | [2]  13 13, 299 💬
 | 
| 11 | 
                
                    Olesoxime
                
            
 💬 | [1]  Olesoxime Olesoxime | [1]  OLESOXIME OLESOXIME | - | - | [3]  2 2, 3, 13 💬
 | 
| 12 | 
                
                    Olipudase alfa
                
            
 💬 | [1]  Olipudase alfa Olipudase alfa | [1]  OLIPUDASE ALFA OLIPUDASE ALFA | [1]  SMPD1 SMPD1 💬
 | [5]  Lysosome Lysosome, Metabolic pathways, Necroptosis, Sphingolipid metabolism, Sphingolipid signaling pathway 💬 | [1]  19 19 💬
 | 
| 13 | 
                
                    Olive oil
                
            
 💬 | [1]  Olive oil Olive oil | [1]  Olive Oil Olive Oil | - | - | [5]  13 13, 35, 49, 53, 162 💬
 | 
| 14 | 
                
                    Olokizumab
                
            
 💬 | [1]  Olokizumab Olokizumab | [1]  Olokizumab Olokizumab | [1]  IL6 IL6 💬
 | [51]  AGE-RAGE signaling pathway in diabetic complications AGE-RAGE signaling pathway in diabetic complications, African trypanosomiasis, Alcoholic liver disease, Alzheimer disease, Amoebiasis, Antifolate resistance, C-type lectin receptor signaling pathway, Cellular senescence, Chagas disease, Coronavirus disease - COVID-19, Cytokine-cytokine receptor interaction, Cytosolic DNA-sensing pathway, EGFR tyrosine kinase inhibitor resistance, Epstein-Barr virus infection, FoxO signaling pathway, Graft-versus-host disease, HIF-1 signaling pathway, Hematopoietic cell lineage, Hepatitis B, Herpes simplex virus 1 infection, Human T-cell leukemia virus 1 infection, Human cytomegalovirus infection, Hypertrophic cardiomyopathy, IL-17 signaling pathway, Inflammatory bowel disease, Influenza A, Insulin resistance, Intestinal immune network for IgA production, JAK-STAT signaling pathway, Kaposi sarcoma-associated herpesvirus infection, Legionellosis, Lipid and atherosclerosis, Malaria, Measles, NOD-like receptor signaling pathway, Non-alcoholic fatty liver disease, PI3K-Akt signaling pathway, Pathogenic Escherichia coli infection, Pathways in cancer, Pathways of neurodegeneration - multiple diseases, Pertussis, Prion disease, Rheumatoid arthritis, Salmonella infection, TNF signaling pathway, Th17 cell differentiation, Toll-like receptor signaling pathway, Transcriptional misregulation in cancer, Tuberculosis, Viral protein interaction with cytokine and cytokine receptor, Yersinia infection 💬 | [2]  46 46, 96 💬
 | 
| 15 | 
                
                    Olsalazine
                
            
 💬 | [1]  Olsalazine Olsalazine | [1]  Olsalazine Olsalazine | - | - | [1]  271 271 💬
 | 
| 16 | 
                
                    Omadacycline
                
            
 💬 | [1]  Omadacycline Omadacycline | [1]  Omadacycline Omadacycline | - | - | [1]  299 299 💬
 | 
| 17 | 
                
                    Omalizumab
                
            
 💬 | [1]  Omalizumab Omalizumab | [2]  Omalizumab Omalizumab; XOLAIR | [1]  FCER1A FCER1A 💬
 | [4]  Asthma Asthma, Fc epsilon RI signaling pathway, Phospholipase D signaling pathway, Sphingolipid signaling pathway 💬 | [7]  46 46, 53, 65, 98, 162, 226, 299 💬
 | 
| 18 | 
                
                    Omaveloxolone
                
            
 💬 | [1]  Omaveloxolone Omaveloxolone | [1]  Omaveloxolone Omaveloxolone | [1]  NFE2L2 NFE2L2 💬
 | [7]  Chemical carcinogenesis - reactive oxygen species Chemical carcinogenesis - reactive oxygen species, Fluid shear stress and atherosclerosis, Hepatocellular carcinoma, Lipid and atherosclerosis, Parkinson disease, Pathways in cancer, Protein processing in endoplasmic reticulum 💬 | [1]  18 18 💬
 | 
| 19 | 
                
                    Omeprazole
                
            
 💬 | [1]  Omeprazole Omeprazole | [4]  Losec Losec; Omeprazol; Omeprazole; OMEPRAZOLE MAGNESIUM | [2]  ATP4A ATP4A, ATP4B 💬
 | [4]  Collecting duct acid secretion Collecting duct acid secretion, Gastric acid secretion, Metabolic pathways, Oxidative phosphorylation 💬 | [14]  6 6, 8, 21, 46, 51, 85, 96, 97, 225, 271, 282, 294, 298, 299 💬
 | 
| 20 | 
                
                    Onasemnogene abeparvovec
                
            
 💬 | [1]  Onasemnogene abeparvovec Onasemnogene abeparvovec | [3]  ONASEMNOGENE ABEPARVOVEC ONASEMNOGENE ABEPARVOVEC; Onasemnogene Abeparvovec-xioi; Zolgensma | [1]  SMN1 SMN1 💬
 | [1]  💬 | [1]  3 3 💬
 | 
| 21 | 
                
                    Ondansetron
                
            
 💬 | [1]  Ondansetron Ondansetron | [1]  Ondansetron Ondansetron | [5]  HTR3A HTR3A, HTR3B, HTR3C, HTR3D, HTR3E 💬
 | [2]  Serotonergic synapse Serotonergic synapse, Taste transduction 💬 | [3]  6 6, 97, 107 💬
 | 
| 22 | 
                
                    Opicapone
                
            
 💬 | [1]  Opicapone Opicapone | [2]  Ongentys Ongentys; OPICAPONE | [1]  COMT COMT 💬
 | [4]  Dopaminergic synapse Dopaminergic synapse, Metabolic pathways, Steroid hormone biosynthesis, Tyrosine metabolism 💬 | [1]  6 6 💬
 | 
| 23 | 
                
                    Opicinumab
                
            
 💬 | [1]  Opicinumab Opicinumab | [1]  Opicinumab Opicinumab | [1]  LINGO1 LINGO1 💬
 | [1]  💬 | [1]  13 13 💬
 | 
| 24 | 
                
                    Oprelvekin
                
            
 💬 | [1]  Oprelvekin Oprelvekin | [5]  IL-11 IL-11; Interleukin 11; Interleukin-11; Oprelvekin; Recombinant interleukin-11 | [1]  IL11RA IL11RA 💬
 | [3]  Cytokine-cytokine receptor interaction Cytokine-cytokine receptor interaction, Hematopoietic cell lineage, JAK-STAT signaling pathway 💬 | [2]  96 96, 288 💬
 | 
| 25 | 
                
                    Orelabrutinib
                
            
 💬 | [1]  Orelabrutinib Orelabrutinib | [1]  Orelabrutinib Orelabrutinib | [1]  BTK BTK 💬
 | [7]  B cell receptor signaling pathway B cell receptor signaling pathway, Epstein-Barr virus infection, Fc epsilon RI signaling pathway, NF-kappa B signaling pathway, Osteoclast differentiation, Platelet activation, Primary immunodeficiency 💬 | [4]  13 13, 49, 61, 63 💬
 | 
| 26 | 
                
                    Orilanolimab
                
            
 💬 | [1]  Orilanolimab Orilanolimab | [1]  ORILANOLIMAB ORILANOLIMAB | [1]  FCGRT FCGRT 💬
 | [1]  💬 | [1]  61 61 💬
 | 
| 27 | 
                
                    Ornithine
                
            
 💬 | [1]  Ornithine Ornithine | [1]  Ornithine Ornithine | - | - | [2]  245 245, 251 💬
 | 
| 28 | 
                
                    Orvepitant
                
            
 💬 | [1]  Orvepitant Orvepitant | [1]  ORVEPITANT ORVEPITANT | [1]  TACR1 TACR1 💬
 | [2]  Calcium signaling pathway Calcium signaling pathway, Neuroactive ligand-receptor interaction 💬 | [1]  85 85 💬
 | 
| 29 | 
                
                    Oseltamivir
                
            
 💬 | [1]  Oseltamivir Oseltamivir | [1]  Oseltamivir Oseltamivir | - | - | [2]  97 97, 299 💬
 | 
| 30 | 
                
                    Osilodrostat
                
            
 💬 | [1]  Osilodrostat Osilodrostat | [1]  OSILODROSTAT OSILODROSTAT | [1]  CYP11B2 CYP11B2 💬
 | [3]  Aldosterone synthesis and secretion Aldosterone synthesis and secretion, Metabolic pathways, Steroid hormone biosynthesis 💬 | [1]  75 75 💬
 | 
| 31 | 
                
                    Otelixizumab
                
            
 💬 | [1]  Otelixizumab Otelixizumab | [1]  Otelixizumab Otelixizumab | [3]  CD3D CD3D, CD3E, CD3G 💬
 | [11]  Chagas disease Chagas disease, Epstein-Barr virus infection, Hematopoietic cell lineage, Human T-cell leukemia virus 1 infection, Human immunodeficiency virus 1 infection, Measles, PD-L1 expression and PD-1 checkpoint pathway in cancer, Primary immunodeficiency, T cell receptor signaling pathway, Th1 and Th2 cell differentiation, Th17 cell differentiation 💬 | [1]  46 46 💬
 | 
| 32 | 
                
                    Otilimab
                
            
 💬 | [1]  Otilimab Otilimab | [1]  OTILIMAB OTILIMAB | [1]  CSF2 CSF2 💬
 | [16]  Acute myeloid leukemia Acute myeloid leukemia, Amoebiasis, Coronavirus disease - COVID-19, Cytokine-cytokine receptor interaction, Fc epsilon RI signaling pathway, Hematopoietic cell lineage, Human T-cell leukemia virus 1 infection, IL-17 signaling pathway, JAK-STAT signaling pathway, Kaposi sarcoma-associated herpesvirus infection, Natural killer cell mediated cytotoxicity, Rheumatoid arthritis, Shigellosis, T cell receptor signaling pathway, TNF signaling pathway, Transcriptional misregulation in cancer 💬 | [1]  46 46 💬
 | 
| 33 | 
                
                    Oxandrolone
                
            
 💬 | [1]  Oxandrolone Oxandrolone | [1]  Oxandrolone Oxandrolone | [1]  AR AR 💬
 | [4]  Chemical carcinogenesis - receptor activation Chemical carcinogenesis - receptor activation, Oocyte meiosis, Pathways in cancer, Prostate cancer 💬 | [2]  211 211, 285 💬
 | 
| 34 | 
                
                    Oxatomide
                
            
 💬 | [1]  Oxatomide Oxatomide | [1]  Oxatomide Oxatomide | [1]  ALOX5 ALOX5 💬
 | [6]  Arachidonic acid metabolism Arachidonic acid metabolism, Fc epsilon RI signaling pathway, Metabolic pathways, Ovarian steroidogenesis, Serotonergic synapse, Toxoplasmosis 💬 | [1]  113 113 💬
 | 
| 35 | 
                
                    Oxcarbazepine
                
            
 💬 | [1]  Oxcarbazepine Oxcarbazepine | [2]  Oxcarbazepine Oxcarbazepine; Trileptal | [5]  SCN1A SCN1A, SCN2A, SCN3A, SCN5A, SCN9A 💬
 | [3]  Adrenergic signaling in cardiomyocytes Adrenergic signaling in cardiomyocytes, Dopaminergic synapse, Taste transduction 💬 | [1]  13 13 💬
 | 
| 36 | 
                
                    Oxiconazole
                
            
 💬 | [1]  Oxiconazole Oxiconazole | [1]  Oxiconazole Oxiconazole | - | - | [1]  160 160 💬
 | 
| 37 | 
                
                    Oxiglutatione
                
            
 💬 | [1]  Glutathione Glutathione | [2]  Glutathione Glutathione; Reduced Glutathione | - | - | [2]  6 6, 299 💬
 | 
| 38 | 
                
                    Oxybuprocaine
                
            
 💬 | [1]  Oxybuprocaine Oxybuprocaine | [1]  Oxybuprocaine Oxybuprocaine | [5]  SCN1A SCN1A, SCN2A, SCN3A, SCN5A, SCN9A 💬
 | [3]  Adrenergic signaling in cardiomyocytes Adrenergic signaling in cardiomyocytes, Dopaminergic synapse, Taste transduction 💬 | [1]  6 6 💬
 | 
| 39 | 
                
                    Oxybutynin
                
            
 💬 | [1]  Oxybutynin Oxybutynin | [1]  Oxybutynin Oxybutynin | [5]  CHRM1 CHRM1, CHRM2, CHRM3, CHRM4, CHRM5 💬
 | [13]  Alzheimer disease Alzheimer disease, Calcium signaling pathway, Cholinergic synapse, Gastric acid secretion, Insulin secretion, Neuroactive ligand-receptor interaction, PI3K-Akt signaling pathway, Pancreatic secretion, Pathways of neurodegeneration - multiple diseases, Regulation of actin cytoskeleton, Salivary secretion, Taste transduction, cAMP signaling pathway 💬 | [3]  6 6, 13, 53 💬
 | 
| 40 | 
                
                    Oxycodone
                
            
 💬 | [1]  Oxycodone Oxycodone | [2]  Oxycodone Oxycodone; OXYCODONE HYDROCHLORIDE | [3]  OPRD1 OPRD1, OPRK1, OPRM1 💬
 | [5]  Estrogen signaling pathway Estrogen signaling pathway, Morphine addiction, Neuroactive ligand-receptor interaction, Sphingolipid signaling pathway, cGMP-PKG signaling pathway 💬 | [5]  6 6, 13, 70, 226, 298 💬
 | 
| 41 | 
                
                    Oxygen
                
            
 💬 | [1]  Oxygen Oxygen | [3]  Medical air Medical air; Nitrogen; Oxygen | - | - | [13]  6 6, 49, 70, 85, 86, 88, 90, 96, 168, 193, 271, 299, 330 💬
 | 
| 42 | 
                
                    Oxymorphone
                
            
 💬 | [1]  Oxymorphone Oxymorphone | [1]  Opana Opana | [1]  OPRM1 OPRM1 💬
 | [3]  Estrogen signaling pathway Estrogen signaling pathway, Morphine addiction, Neuroactive ligand-receptor interaction 💬 | [1]  70 70 💬
 | 
| 43 | 
                
                    Oxyquinoline
                
            
 💬 | [1]  Oxyquinoline Oxyquinoline | [1]  Oxine Oxine | - | - | [1]  13 13 💬
 | 
| 44 | 
                
                    Oxytocin
                
            
 💬 | [1]  Oxytocin Oxytocin | [2]  Oxytocin Oxytocin; Syntocinon | [1]  OXTR OXTR 💬
 | [4]  Calcium signaling pathway Calcium signaling pathway, Neuroactive ligand-receptor interaction, Oxytocin signaling pathway, cAMP signaling pathway 💬 | [7]  6 6, 72, 127, 168, 193, 206, 226 💬
 | 
| 45 | 
                
                    Ozanezumab
                
            
 💬 | [1]  Ozanezumab Ozanezumab | [1]  Ozanezumab Ozanezumab | [1]  RTN4 RTN4 💬
 | [1]  Alzheimer disease Alzheimer disease 💬 | [1]  2 2 💬
 | 
| 46 | 
                
                    Ozanimod
                
            
 💬 | [1]  Ozanimod Ozanimod | [2]  Ozanimod Ozanimod; Zeposia | [5]  S1PR1 S1PR1, S1PR2, S1PR3, S1PR4, S1PR5 💬
 | [3]  FoxO signaling pathway FoxO signaling pathway, Neuroactive ligand-receptor interaction, Sphingolipid signaling pathway 💬 | [3]  13 13, 96, 97 💬
 | 
| 47 | 
                
                    Ozoralizumab
                
            
 💬 | [1]  Ozoralizumab Ozoralizumab | [1]  Ozoralizumab Ozoralizumab | [1]  TNF TNF 💬
 | [67]  AGE-RAGE signaling pathway in diabetic complications AGE-RAGE signaling pathway in diabetic complications, Adipocytokine signaling pathway, African trypanosomiasis, Alcoholic liver disease, Allograft rejection, Alzheimer disease, Amoebiasis, Amyotrophic lateral sclerosis, Antifolate resistance, Antigen processing and presentation, Apoptosis, Asthma, C-type lectin receptor signaling pathway, Chagas disease, Coronavirus disease - COVID-19, Cytokine-cytokine receptor interaction, Dilated cardiomyopathy, Epstein-Barr virus infection, Fc epsilon RI signaling pathway, Fluid shear stress and atherosclerosis, Graft-versus-host disease, Hematopoietic cell lineage, Hepatitis B, Hepatitis C, Herpes simplex virus 1 infection, Human T-cell leukemia virus 1 infection, Human cytomegalovirus infection, Human immunodeficiency virus 1 infection, Human papillomavirus infection, Hypertrophic cardiomyopathy, IL-17 signaling pathway, Inflammatory bowel disease, Influenza A, Insulin resistance, Legionellosis, Leishmaniasis, Lipid and atherosclerosis, MAPK signaling pathway, Malaria, NF-kappa B signaling pathway, NOD-like receptor signaling pathway, Natural killer cell mediated cytotoxicity, Necroptosis, Non-alcoholic fatty liver disease, Osteoclast differentiation, Pathogenic Escherichia coli infection, Pathways of neurodegeneration - multiple diseases, Pertussis, Prion disease, Proteoglycans in cancer, RIG-I-like receptor signaling pathway, Rheumatoid arthritis, Salmonella infection, Shigellosis, Sphingolipid signaling pathway, Systemic lupus erythematosus, T cell receptor signaling pathway, TGF-beta signaling pathway, TNF signaling pathway, Toll-like receptor signaling pathway, Toxoplasmosis, Tuberculosis, Type I diabetes mellitus, Type II diabetes mellitus, Viral protein interaction with cytokine and cytokine receptor, Yersinia infection, mTOR signaling pathway 💬 | [1]  46 46 💬
 |