Drug interactions
furosemide + methyldopa
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Overview
Additive antihypertensive effects increase risk of hypotension/orthostasis, especially with diuretic-induced volume depletion.
Mechanism of action
Pharmacodynamic additivity: loop diuresis/natriuresis (furosemide) plus central alpha-2 agonism (methyldopa) lowers BP and may potentiate orthostatic hypotension.
Clinical management
Monitor BP (including orthostatics) and renal function/electrolytes; start low and titrate; consider dose reduction if symptomatic hypotension occurs; ensure adequate volume status.
Drug reference
References
- Furosemide: Drug Interactions — Lexicomp
- Methyldopa: Drug Interactions — Lexicomp
Frequently asked questions
Can I take furosemide with methyldopa?
The interaction is rated: Moderate. Additive antihypertensive effects increase risk of hypotension/orthostasis, especially with diuretic-induced volume depletion.
How serious is the interaction between furosemide and methyldopa?
The interaction is rated: Moderate. Evidence level: High.
How is the interaction between furosemide and methyldopa managed?
Monitor BP (including orthostatics) and renal function/electrolytes; start low and titrate; consider dose reduction if symptomatic hypotension occurs; ensure adequate volume status.
Why do furosemide and methyldopa interact?
Pharmacodynamic additivity: loop diuresis/natriuresis (furosemide) plus central alpha-2 agonism (methyldopa) lowers BP and may potentiate orthostatic hypotension.
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