Adverse Drug Reaction Classification System

Pharmaceutical Information
Drug Name Leflunomide
Drug ID BADD_D01252
Description Leflunomide is a pyrimidine synthesis inhibitor belonging to the DMARD (disease-modifying antirheumatic drug) class of drugs, which are chemically and pharmacologically very heterogeneous. Leflunomide was approved by FDA and in many other countries (e.g., Canada, Europe) in 1999.
Indications and Usage For the management of the signs and symptoms of active rheumatoid arthritis (RA) to improve physical function and to slow the progression of structural damage associated with the disease. Has also been used for the prevention of acute and chronic rejection in recipients of solid organ trasnplants and is designated by the FDA as an orphan drug for this use.
Marketing Status approved; investigational
ATC Code L04AA13
DrugBank ID DB01097
KEGG ID D00749
MeSH ID D000077339
PubChem ID 3899
TTD Drug ID D08ROP
NDC Product Code 23155-044; 35573-447; 59651-349; 35573-448; 12579-510; 0088-2161; 59651-348; 60505-2502; 70748-130; 72266-133; 60505-2503; 0088-2160; 23155-043; 50268-478; 62332-061; 70771-1491; 70771-1492; 12579-509; 0955-1737; 71052-260; 10702-278; 46708-437; 0955-1735; 51927-4520; 10702-277; 0088-2162; 50268-477; 62332-062; 70518-3240; 70748-129; 14593-911; 46708-436; 70710-1157; 70710-1158; 72266-132; 53104-7557; 57741-3600; 66499-0001; 42291-420; 42291-421; 50090-5992
UNII G162GK9U4W
Synonyms Leflunomide | N-(4-Trifluoromethyphenyl)-5-methylisoxazole-4-carboxamide | HWA 486 | HWA-486 | HWA486 | SU101 | Arava
Chemical Information
Molecular Formula C12H9F3N2O2
CAS Registry Number 75706-12-6
SMILES CC1=C(C=NO1)C(=O)NC2=CC=C(C=C2)C(F)(F)F
Chemical Structure
ADRs Induced by Drug
*The priority for ADR severity classification is based on FAERS assessment, followed by the most severe level in CTCAE rating. If neither is available, it will be displayed as 'Not available'.
**The 'Not Available' level is hidden by default and can be restored by clicking on the legend twice..
ADR Term ADReCS ID ADR Frequency (FAERS) ADR Severity Grade (FAERS) ADR Severity Grade (CTCAE)
Thrombotic microangiopathy01.01.02.006; 24.01.01.013; 20.01.07.0040.000428%Not Available
Thyroiditis05.02.04.0010.000428%Not Available
Tooth disorder07.09.05.001--Not Available
Toothache07.09.06.0010.000943%
Toxic epidermal necrolysis12.03.01.015; 11.07.01.006; 10.01.01.006; 23.03.01.0080.001071%
Transient ischaemic attack17.08.04.001; 24.04.06.0050.000643%
Transitional cell carcinoma16.08.04.002; 20.08.01.0100.001071%Not Available
Tuberculosis11.04.01.006--Not Available
Ulcer08.03.06.0010.001071%Not Available
Umbilical hernia07.16.03.001--Not Available
Upper respiratory tract infection22.07.03.011; 11.01.13.009--
Urethral disorder20.07.01.002--Not Available
Urinary incontinence20.02.02.010; 17.05.01.0080.000643%
Urinary tract disorder20.08.01.001--Not Available
Urinary tract infection20.08.02.001; 11.01.14.004--
Urticaria23.04.02.001; 10.01.06.001--
Varicose vein24.10.04.001--Not Available
Vasculitic rash24.12.04.026; 23.06.02.003; 10.02.02.0120.000857%Not Available
Vasculitis10.02.02.006; 24.12.04.0270.002142%
Vasculitis necrotising24.12.04.029; 10.02.02.008--Not Available
Vasodilatation24.03.02.003; 23.06.05.0060.000428%Not Available
Vertigo17.02.12.002; 04.04.01.0030.001285%
Vision blurred17.17.01.010; 06.02.06.007--
Vitreous floaters06.09.01.0050.000643%
Vomiting07.01.07.0030.009126%
Vulvovaginal candidiasis21.14.02.003; 11.03.03.005--Not Available
Weight decreased13.15.01.005--
Wheezing22.03.01.0090.000428%
Zinc deficiency14.13.01.0010.001157%Not Available
Tubulointerstitial nephritis20.05.02.0020.001071%Not Available
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ADReCS-Target
Drug Name ADR Term Target
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