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)
Haematuria24.07.01.047; 20.02.01.0060.013755%
Blood urine present13.13.02.0020.001021%Not Available
Haemoglobin abnormal13.01.05.0110.000120%Not Available
Haemoglobin decreased13.01.05.0030.023786%Not Available
Haemoglobin increased13.01.05.0040.000120%
Haemolysis01.06.04.0020.000180%
Haemolytic anaemia01.06.03.002--Not Available
Haemoptysis24.07.01.006; 22.02.03.004; 02.01.02.0060.007148%Not Available
Haemorrhage intracranial24.07.04.003; 17.08.01.0080.006769%
Haemorrhage subcutaneous23.06.07.002; 24.07.06.0100.000961%Not Available
Haemorrhagic disorder24.07.01.021; 01.01.03.0040.000300%Not Available
Haemorrhagic stroke24.07.04.014; 17.08.01.0110.000768%Not Available
Haemorrhoids24.10.02.002; 07.15.03.0010.001442%
Haemothorax12.01.03.002; 24.07.01.008; 22.05.02.0010.002222%
Hallucination19.10.02.002--
Hand fracture15.08.03.014; 12.04.01.0140.000240%Not Available
Headache17.14.01.001--
Heart rate decreased13.14.04.001--Not Available
Heart rate increased13.14.04.002--Not Available
Heart rate irregular13.14.04.003--Not Available
Heart sounds abnormal13.14.01.0020.000120%Not Available
Hemianopia17.17.01.012; 06.02.07.0040.000240%Not Available
Hemiparesis17.01.04.0010.002222%
Hemiplegia17.01.04.0020.001021%Not Available
Henoch-Schonlein purpura24.07.06.003; 23.06.01.002; 10.02.02.004; 01.01.04.0010.000120%Not Available
Hepatic cirrhosis09.01.04.0010.000141%Not Available
Hepatic encephalopathy17.13.01.003; 09.01.03.006--Not Available
Hepatic failure09.01.03.002--
Hepatic function abnormal09.01.02.001--Not Available
Hepatic haemorrhage24.07.01.027; 12.01.02.007; 09.01.06.0080.000120%
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