Drug interactions
Epinephrine + Phendimetrazine
Severity: Moderate
Epinephrine and Phendimetrazine: 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
Phendimetrazine is a sympathomimetic anorectic that is converted to phenmetrazine, which releases catecholamines. Adding epinephrine can potentiate rises in blood pressure and heart rate and increase the risk of arrhythmia.
What this interaction means in plain words
Epinephrine and Phendimetrazine 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.
Why it happens
Additive sympathomimetic effects from catecholamine release and direct adrenergic stimulation.
What to do
Monitor blood pressure, heart rate and rhythm when epinephrine is given to patients taking phendimetrazine. Use the lowest effective epinephrine dose, including in local anesthetic preparations.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Epinephrine and Phendimetrazine, 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.
Other interactions of Epinephrine
- Epinephrine + Isocarboxazid Contraindicated
- Epinephrine + Phenelzine Contraindicated
- Epinephrine + Tranylcypromine Contraindicated
- Acebutolol + Epinephrine Major
- Amitriptyline + Epinephrine Major
- Amoxapine + Epinephrine Major
Frequently asked questions
Can I take Epinephrine with Phendimetrazine?
MediHelp rates the interaction as moderate. Epinephrine and Phendimetrazine 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. Phendimetrazine is a sympathomimetic anorectic that is converted to phenmetrazine, which releases catecholamines. Adding epinephrine can potentiate rises in blood pressure and heart rate and increase the risk of arrhythmia.
How serious is the interaction between Epinephrine and Phendimetrazine?
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, heart rate and rhythm when epinephrine is given to patients taking phendimetrazine. Use the lowest effective epinephrine dose, including in local anesthetic preparations.
What other medicines interact with Epinephrine?
MediHelp also lists interactions of Epinephrine with, for example, Isocarboxazid, Phenelzine, Tranylcypromine. The full list is on the Epinephrine 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.
