Drug interactions
Clonidine + Methyldopa
Severity: Moderate
Clonidine 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
Both are centrally acting sympatholytic antihypertensives, so combining them gives additive blood pressure lowering with little rationale for duplication. They may also cause bradycardia, worsen sinus node dysfunction or AV block, and increase sedation.
What this interaction means in plain words
Clonidine 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.
Clonidine belongs to Cardiovascular; Methyldopa belongs to Cardiovascular.
Why it happens
Duplicate central alpha-2 adrenergic stimulation reducing sympathetic outflow.
What to do
Avoid routine combination; if used, monitor blood pressure and heart rate and use caution with conduction disease. Choose agents from different classes where possible.
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 Clonidine
- Acebutolol + Clonidine Major
- Amifostine + Clonidine Major
- Amiodarone + Clonidine Major
- Amoxapine + Clonidine Major
- Atenolol-chlorthalidone + Clonidine Major
- Atenolol + Clonidine Major
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 Clonidine with Methyldopa?
MediHelp rates the interaction as moderate. Clonidine 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. Both are centrally acting sympatholytic antihypertensives, so combining them gives additive blood pressure lowering with little rationale for duplication. They may also cause bradycardia, worsen sinus node dysfunction or AV block, and increase sedation.
How serious is the interaction between Clonidine 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: Avoid routine combination; if used, monitor blood pressure and heart rate and use caution with conduction disease. Choose agents from different classes where possible.
What other medicines interact with Clonidine?
MediHelp also lists interactions of Clonidine with, for example, Acebutolol, Amifostine, Amiodarone. The full list is on the Clonidine page.
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