Drug interactions
Methamphetamine + Protriptyline
Severity: Major
Methamphetamine and Protriptyline: 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
Protriptyline can potentiate the cardiovascular effects of amphetamines by blocking norepinephrine reuptake, and may also reduce the indirect effects by blocking amphetamine uptake into adrenergic neurons. Hypertension, tachycardia and arrhythmias may occur, and both drugs can lower seizure threshold. Protriptyline is also a CYP2D6 substrate, and amphetamines may raise tricyclic levels.
What this interaction means in plain words
Methamphetamine and Protriptyline 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
Protriptyline blocks norepinephrine reuptake and neuronal uptake of methamphetamine, altering adrenergic response unpredictably.
What to do
Avoid the combination if an alternative exists. If needed, monitor blood pressure, heart rate and ECG, and use the lowest effective doses.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Methamphetamine and Protriptyline, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
References
Other interactions of Methamphetamine
- Isocarboxazid + Methamphetamine Contraindicated
- Linezolid + Methamphetamine Contraindicated
- Methamphetamine + Phenelzine Contraindicated
- Methamphetamine + Procarbazine Contraindicated
- Methamphetamine + Rasagiline Contraindicated
- Methamphetamine + Safinamide Contraindicated
Frequently asked questions
Can I take Methamphetamine with Protriptyline?
MediHelp rates the interaction as major. Methamphetamine and Protriptyline 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. Protriptyline can potentiate the cardiovascular effects of amphetamines by blocking norepinephrine reuptake, and may also reduce the indirect effects by blocking amphetamine uptake into adrenergic neurons. Hypertension, tachycardia and arrhythmias may occur, and both drugs can lower seizure threshold. Protriptyline is also a CYP2D6 substrate, and amphetamines may raise tricyclic levels.
How serious is the interaction between Methamphetamine and Protriptyline?
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 the combination if an alternative exists. If needed, monitor blood pressure, heart rate and ECG, and use the lowest effective doses.
What other medicines interact with Methamphetamine?
MediHelp also lists interactions of Methamphetamine with, for example, Isocarboxazid, Linezolid, Phenelzine. The full list is on the Methamphetamine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
