Drug interactions
Methyldopa + Pimozide
Severity: Moderate
Methyldopa and Pimozide: 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
Pimozide is a potent dopamine antagonist and methyldopa can interfere with dopaminergic and central adrenergic function. Combined use may cause extrapyramidal symptoms, sedation and additive hypotension. Evidence is limited and mostly theoretical or from case reports.
What this interaction means in plain words
Methyldopa and Pimozide 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 belongs to Cardiovascular; Pimozide belongs to Central Nervous System.
Why it happens
Pharmacodynamic interaction involving dopamine receptor blockade and methyldopa's false-transmitter and central alpha-2 effects.
What to do
Monitor blood pressure and neurological status, especially extrapyramidal symptoms, after starting or changing doses. Consider an alternative antihypertensive if movement disorders appear.
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 Pimozide
- Adagrasib + Pimozide Contraindicated
- Amiodarone + Pimozide Contraindicated
- Amisulpride + Pimozide Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amoxapine + Pimozide Contraindicated
- Anagrelide + Pimozide Contraindicated
Frequently asked questions
Can I take Methyldopa with Pimozide?
MediHelp rates the interaction as moderate. Methyldopa and Pimozide 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. Pimozide is a potent dopamine antagonist and methyldopa can interfere with dopaminergic and central adrenergic function. Combined use may cause extrapyramidal symptoms, sedation and additive hypotension. Evidence is limited and mostly theoretical or from case reports.
How serious is the interaction between Methyldopa and Pimozide?
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 and neurological status, especially extrapyramidal symptoms, after starting or changing doses. Consider an alternative antihypertensive if movement disorders appear.
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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