Adverse Drug Reaction Classification System

Pharmaceutical Information
Drug Name Warfarin
Drug ID BADD_D02373
Description Warfarin is an anticoagulant drug normally used to prevent blood clot formation as well as migration. Although originally marketed as a pesticide (d-Con, Rodex, among others), Warfarin has since become the most frequently prescribed oral anticoagulant in North America. Warfarin has several properties that should be noted when used medicinally, including its ability to cross the placental barrier during pregnancy which can result in fetal bleeding, spontaneous abortion, preterm birth, stillbirth, and neonatal death. Additional adverse effects such as necrosis, purple toe syndrome, osteoporosis, valve and artery calcification, and drug interactions have also been documented with warfarin use. Warfarin does not actually affect blood viscosity, rather, it inhibits vitamin-k dependent synthesis of biologically active forms of various clotting factors in addition to several regulatory factors.
Indications and Usage For the treatment of retinal vascular occlusion, pulmonary embolism, cardiomyopathy, atrial fibrillation and flutter, cerebral embolism, transient cerebral ischaemia, arterial embolism and thrombosis.
Marketing Status Discontinued; Prescription
ATC Code B01AA03
DrugBank ID DB00682
KEGG ID D08682
MeSH ID D014859
PubChem ID 54678486
TTD Drug ID D0E3OF
NDC Product Code 50090-2582; 71610-462; 76282-329; 50090-2613; 51407-341; 51407-342; 43353-028; 70934-821; 51407-347; 43353-023; 65162-763; 70934-820; 76282-328; 65162-769; 71610-448; 50090-3263; 71335-1786; 70518-2816; 65162-762; 76282-333; 71335-1824; 70934-911; 43353-053; 50090-2654; 76282-335; 65162-764; 43353-029; 65162-766; 70518-2382; 50090-2936; 51407-348; 65162-767; 43353-054; 65162-761; 50090-2646; 43353-030; 51407-343; 51407-346; 70518-2381; 43353-021; 50090-2586; 70518-2717; 76282-334; 50090-5058; 76282-331; 71610-490; 71610-491; 76282-332; 43353-033; 71610-519; 65162-765; 50090-2645; 70934-587; 76282-327; 70518-2383; 65162-768; 51407-349; 70518-2395; 71335-1595; 50090-2617; 51407-344; 51407-345; 71610-458; 70518-2380; 70518-2394; 76282-330
Synonyms Warfarin | 4-Hydroxy-3-(3-oxo-1-phenylbutyl)-2H-1-benzopyran-2-one | Apo-Warfarin | Aldocumar | Gen-Warfarin | Warfant | Coumadin | Marevan | Warfarin Potassium | Potassium, Warfarin | Warfarin Sodium | Sodium, Warfarin | Coumadine | Tedicumar
Chemical Information
Molecular Formula C19H16O4
CAS Registry Number 81-81-2
SMILES CC(=O)CC(C1=CC=CC=C1)C2=C(C3=CC=CC=C3OC2=O)O
Chemical Structure
ADR Related Proteins Induced by Drug
ADR Term Protein Name UniProt AC TTD Target ID PMID
Coagulation time shortenedCytochrome P450 2C19P33261Not Available1109248; 806430; 1580446; 5006877; 806430; 5458032; 1109248; 15871634; 15487810; 15324521; 9200780; 624779; 12841813; 6690067; 3719899; 6499359
HaemorrhageCytochrome P450 2C9P11712T1924410073515; 11926893; 10961881
ADRs Induced by Drug
ADR Term ADReCS ID ADR Frequency (FAERS) ADR Severity Grade (FAERS) ADR Severity Grade (CTCAE)
Gastrointestinal erosion07.04.04.0090.000541%Not Available
Myxoedema coma17.02.09.009; 14.11.01.042; 05.02.03.0060.000120%Not Available
Embolic cerebral infarction24.01.04.009; 17.08.01.0290.000031%Not Available
Arterial haemorrhage24.07.01.0630.000120%Not Available
Cerebellar haematoma24.07.04.022; 17.08.01.0450.000031%Not Available
Communication disorder19.19.01.0080.000120%Not Available
Escherichia infection11.02.10.0040.000120%Not Available
Klebsiella infection11.02.03.0030.000180%Not Available
Large intestinal ulcer haemorrhage24.07.02.027; 07.04.06.0070.000120%Not Available
Traumatic intracranial haemorrhage24.07.04.034; 17.08.05.005; 12.01.10.0170.000172%Not Available
Aortic valve disease02.07.03.0020.000420%
Angiodysplasia24.03.03.0170.000180%Not Available
Nerve root compression17.10.01.0160.000120%Not Available
Nose deformity15.10.05.0060.000120%Not Available
Liver scan abnormal13.03.03.0010.000120%Not Available
Congenital nose malformation22.10.02.003; 03.16.04.0010.000901%Not Available
Erosive duodenitis07.04.02.0060.000120%Not Available
Thoracic haemorrhage24.07.01.082; 22.02.07.0170.000031%Not Available
International normalised ratio fluctuation13.01.02.0530.009190%Not Available
Post procedural pulmonary embolism24.01.06.009; 22.06.02.008; 12.02.07.0120.000120%Not Available
Thyroid haemorrhage24.07.01.083; 05.02.01.0050.000180%Not Available
Haemorrhagic arteriovenous malformation03.07.03.008; 24.03.03.0320.000300%Not Available
Faecal vomiting07.01.07.0130.000120%Not Available
Portal venous gas07.01.06.0330.000031%Not Available
Tooth avulsion12.01.09.021; 07.09.09.0020.000120%Not Available
Basal ganglia haemorrhage24.07.04.021; 17.08.01.0390.000110%Not Available
Vasogenic cerebral oedema17.07.02.0080.000300%Not Available
Cerebral microhaemorrhage24.07.04.025; 17.08.02.0190.000120%Not Available
Abdominal wall haematoma24.07.02.039; 07.16.05.0050.005166%Not Available
Skin plaque23.03.03.0440.000120%Not Available
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