Adverse Drug Reaction Classification System

Pharmaceutical Information
Drug Name Methyldopa
Drug ID BADD_D01425
Description Methyldopa, or α-methyldopa, is a centrally acting sympatholytic agent and an antihypertensive agent.[A231784] It is an analog of DOPA (3,4‐hydroxyphenylanine), and it is a prodrug, meaning that the drug requires biotransformation to an active metabolite for therapeutic effects. Methyldopa works by binding to alpha(α)-2 adrenergic receptors as an agonist, leading to the inhibition of adrenergic neuronal outflow and reduction of vasoconstrictor adrenergic signals.[A1499] Methyldopa exists in two isomers D-α-methyldopa and L-α-methyldopa, which is the active form.[A232224] First introduced in 1960 as an antihypertensive agent, methyldopa was considered to be useful in certain patient populations, such as pregnant women and patients with renal insufficiency. Since then, methyldopa was largely replaced by newer, better-tolerated antihypertensive agents;[A231784] however, it is still used as monotherapy [L32614] or in combination with [hydrochlorothiazide].[L32619] Methyldopa is also available as intravenous injection, which is used to manage hypertension when oral therapy is unfeasible and to treat hypertensive crisis.[L32624]
Indications and Usage Methyldopa is indicated for the management of hypertension as monotherapy [L32614] or in combination with hydrochlorothiazide.[L32619] Methyldopa injection is used to manage hypertensive crises.[L32624]
Marketing Status approved
ATC Code Not Available
DrugBank ID DB00968
KEGG ID D00405; D08205
MeSH ID D008750
PubChem ID 38853
TTD Drug ID D0BA6T
NDC Product Code 67628-3001; 52423-0100; 42185-7001; 15894-0038; 62135-321; 62135-322
UNII 56LH93261Y
Synonyms Methyldopa | alpha-Methyldopa | alpha Methyldopa | alpha-Methyl-L-Dopa | alpha Methyl L Dopa | Alphamethyldopa | Meldopa | Methyldopate | Dopegyt | Dopergit | Dopegit | Sembrina | Apo-Methyldopa | Apo Methyldopa | Dopamet | Aldomet | Hydopa | Nu-Medopa | Nu Medopa
Chemical Information
Molecular Formula C10H13NO4
CAS Registry Number 555-30-6
SMILES CC(CC1=CC(=C(C=C1)O)O)(C(=O)O)N
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)
Abdominal distension07.01.04.001--
Abdominal pain07.01.05.0020.001540%
Abortion spontaneous18.01.04.0010.001027%-
Acute hepatic failure09.01.03.0010.001027%-
Agranulocytosis01.02.03.001---
Amenorrhoea05.05.01.002; 21.01.02.001--
Angina pectoris02.02.02.002; 24.04.04.002--
Aphthous ulcer07.05.06.002---
Arthralgia15.01.02.001--
Asthenia08.01.01.001---
Blood urea increased13.13.01.006---
Body temperature increased13.15.01.001---
Bradycardia02.03.02.002---
Bradycardia foetal02.03.02.018; 18.03.02.0060.001027%-
Breast enlargement21.05.04.001---
Cardiac failure02.05.01.001--
Cardiac failure congestive02.05.01.002---
Chills08.01.09.001; 15.05.03.016--
Coagulopathy01.01.02.0010.001027%-
Colitis07.08.01.001--
Confusional state17.02.03.005; 19.13.01.001--
Constipation07.02.02.001--
Depression19.15.01.001--
Dermatitis23.03.04.002---
Diarrhoea07.02.01.001--
Disorientation17.02.05.015; 19.13.01.002---
Dizziness02.11.04.006; 17.02.05.003; 24.06.02.007--
Drug withdrawal syndrome neonatal08.06.02.008; 18.04.13.001; 19.07.06.0140.001027%-
Dry mouth07.06.01.002--
Dyskinesia17.01.02.006--
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ADReCS-Target
Drug Name ADR Term Target
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