Drug interactions
Isoproterenol + Methyldopa
Severity: Moderate
Isoproterenol and Methyldopa: moderate interaction.
Last updated
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.
Summary
Methyldopa may augment the response to sympathomimetics such as isoproterenol, causing exaggerated changes in heart rate or blood pressure. Evidence is limited.
What this interaction means in plain words
Isoproterenol and Methyldopa can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Isoproterenol belongs to Respiratory; Methyldopa belongs to Cardiovascular.
Why it happens
Mechanism is not established; altered adrenergic receptor sensitivity is proposed.
What to do
Monitor heart rate, rhythm and blood pressure during isoproterenol therapy. Titrate to effect using the lowest effective dose.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Methyldopa
- Methyldopa + Tranylcypromine Contraindicated
- Iobenguane i + Methyldopa Major
- Lofexidine + Methyldopa Major
- Methyldopa + Pexidartinib Major
- Methyldopa + Pretomanid Major
- Methyldopa + Thioridazine Major
Other interactions of Isoproterenol
Frequently asked questions
Can I take Isoproterenol with Methyldopa?
MediHelp rates the interaction as moderate. Isoproterenol and Methyldopa can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Methyldopa may augment the response to sympathomimetics such as isoproterenol, causing exaggerated changes in heart rate or blood pressure. Evidence is limited.
How serious is the interaction between Isoproterenol and Methyldopa?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor heart rate, rhythm and blood pressure during isoproterenol therapy. Titrate to effect using the lowest effective dose.
What other medicines interact with Methyldopa?
MediHelp also lists interactions of Methyldopa with, for example, Tranylcypromine, Iobenguane i, Lofexidine. The full list is on the Methyldopa page.
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