Drug interactions
Benzphetamine + Methyldopa
Severity: Moderate
Benzphetamine 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
Benzphetamine is a sympathomimetic anorectic that can raise blood pressure and may blunt the antihypertensive effect of methyldopa. Loss of blood pressure control may result.
What this interaction means in plain words
Benzphetamine 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.
Why it happens
Pharmacodynamic antagonism, as sympathomimetic pressor effects oppose methyldopa's reduction in sympathetic tone.
What to do
Monitor blood pressure regularly and adjust antihypertensive therapy as needed. Consider a non-sympathomimetic weight-loss option if control worsens.
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
Frequently asked questions
Can I take Benzphetamine with Methyldopa?
MediHelp rates the interaction as moderate. Benzphetamine 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. Benzphetamine is a sympathomimetic anorectic that can raise blood pressure and may blunt the antihypertensive effect of methyldopa. Loss of blood pressure control may result.
How serious is the interaction between Benzphetamine 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 blood pressure regularly and adjust antihypertensive therapy as needed. Consider a non-sympathomimetic weight-loss option if control worsens.
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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