Drug interactions
Epinephrine + Methyclothiazide
Severity: Moderate
Epinephrine and Methyclothiazide: 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
Epinephrine can lower serum potassium through beta-2 mediated cellular uptake, and thiazide diuretics cause potassium loss through renal excretion. Together they may produce clinically relevant hypokalemia and raise the risk of ventricular arrhythmias, mainly with repeated or high-dose epinephrine.
What this interaction means in plain words
Epinephrine and Methyclothiazide 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 hypokalemia from beta-2 driven intracellular potassium shift plus thiazide-induced renal potassium wasting.
What to do
Check serum potassium and replace it as needed when epinephrine is given repeatedly or at high doses to patients on thiazides. Monitor ECG in patients with cardiac disease.
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 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 Methyclothiazide?
MediHelp rates the interaction as moderate. Epinephrine and Methyclothiazide 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. Epinephrine can lower serum potassium through beta-2 mediated cellular uptake, and thiazide diuretics cause potassium loss through renal excretion. Together they may produce clinically relevant hypokalemia and raise the risk of ventricular arrhythmias, mainly with repeated or high-dose epinephrine.
How serious is the interaction between Epinephrine and Methyclothiazide?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check serum potassium and replace it as needed when epinephrine is given repeatedly or at high doses to patients on thiazides. Monitor ECG in patients with cardiac disease.
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.
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