Drug interactions
Clonidine + Trimipramine
Severity: Major
Clonidine and Trimipramine: major interaction.
Last updated Sources: US FDA label
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
Tricyclic antidepressants such as trimipramine can blunt or reverse the antihypertensive action of clonidine, leading to loss of blood pressure control. Hypertensive episodes have been reported with tricyclics and clonidine, and sedation may be additive.
What this interaction means in plain words
Clonidine and Trimipramine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Clonidine belongs to Cardiovascular; Trimipramine belongs to Central Nervous System.
Why it happens
Tricyclic antagonism of central alpha-2 mediated hypotensive effect, with additional blockade of adrenergic neuronal uptake.
What to do
Prefer a different antihypertensive or antidepressant where possible. If both are needed, monitor blood pressure closely and adjust doses, and never stop clonidine abruptly.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
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 Trimipramine
- Disopyramide + Trimipramine Contraindicated
- Dofetilide + Trimipramine Contraindicated
- Ibutilide + Trimipramine Contraindicated
- Isocarboxazid + Trimipramine Contraindicated
- Pentamidine + Trimipramine Contraindicated
- Phenelzine + Trimipramine Contraindicated
Frequently asked questions
Can I take Clonidine with Trimipramine?
MediHelp rates the interaction as major. Clonidine and Trimipramine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Tricyclic antidepressants such as trimipramine can blunt or reverse the antihypertensive action of clonidine, leading to loss of blood pressure control. Hypertensive episodes have been reported with tricyclics and clonidine, and sedation may be additive.
How serious is the interaction between Clonidine and Trimipramine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Prefer a different antihypertensive or antidepressant where possible. If both are needed, monitor blood pressure closely and adjust doses, and never stop clonidine abruptly.
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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