Drug interactions
Benzphetamine + Nortriptyline
Severity: Major
Benzphetamine and Nortriptyline: major 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
Tricyclic antidepressants block norepinephrine reuptake and the neuronal uptake of indirectly acting sympathomimetics, so the response to benzphetamine can be unpredictable. Increased pressor and cardiac stimulation, including hypertension and arrhythmia, may occur.
What this interaction means in plain words
Benzphetamine and Nortriptyline 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.
Why it happens
Altered adrenergic neuronal uptake and norepinephrine reuptake blockade changes sympathomimetic response.
What to do
Avoid combining where possible; benzphetamine is a short-term weight-loss agent that can be deferred. If used together, monitor blood pressure and heart rate and watch for arrhythmia.
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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Other interactions of Nortriptyline
- Disopyramide + Nortriptyline Contraindicated
- Dofetilide + Nortriptyline Contraindicated
- Dronedarone + Nortriptyline Contraindicated
- Ibutilide + Nortriptyline Contraindicated
- Isocarboxazid + Nortriptyline Contraindicated
- Methylene blue + Nortriptyline Contraindicated
Frequently asked questions
Can I take Benzphetamine with Nortriptyline?
MediHelp rates the interaction as major. Benzphetamine and Nortriptyline 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 block norepinephrine reuptake and the neuronal uptake of indirectly acting sympathomimetics, so the response to benzphetamine can be unpredictable. Increased pressor and cardiac stimulation, including hypertension and arrhythmia, may occur.
How serious is the interaction between Benzphetamine and Nortriptyline?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid combining where possible; benzphetamine is a short-term weight-loss agent that can be deferred. If used together, monitor blood pressure and heart rate and watch for arrhythmia.
What other medicines interact with Nortriptyline?
MediHelp also lists interactions of Nortriptyline with, for example, Disopyramide, Dofetilide, Dronedarone. The full list is on the Nortriptyline page.
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