Drug interactions
Methyclothiazide + Propranolol
Severity: Minor
Methyclothiazide and Propranolol: minor 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
Thiazide diuretics may raise blood glucose, lipids and uric acid, and propranolol can mask hypoglycemia symptoms and add to blood pressure lowering. The combination is commonly used for hypertension and is generally manageable.
What this interaction means in plain words
Methyclothiazide and Propranolol have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Additive antihypertensive pharmacodynamic effect, with overlapping metabolic effects on glucose handling.
What to do
Monitor blood pressure, heart rate, and serum potassium and glucose, especially in diabetic patients.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Methyclothiazide and Propranolol, 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 Propranolol
- Propranolol + Thioridazine Contraindicated
- Acebutolol + Propranolol Major
- Adrenaline-articaine + Propranolol Major
- Amifostine + Propranolol Major
- Amiodarone + Propranolol Major
- Arformoterol + Propranolol Major
Frequently asked questions
Can I take Methyclothiazide with Propranolol?
MediHelp rates the interaction as minor. Methyclothiazide and Propranolol have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Thiazide diuretics may raise blood glucose, lipids and uric acid, and propranolol can mask hypoglycemia symptoms and add to blood pressure lowering. The combination is commonly used for hypertension and is generally manageable.
How serious is the interaction between Methyclothiazide and Propranolol?
MediHelp rates it minor, 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 serum potassium and glucose, especially in diabetic patients.
What other medicines interact with Propranolol?
MediHelp also lists interactions of Propranolol with, for example, Thioridazine, Acebutolol, Adrenaline-articaine. The full list is on the Propranolol 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.
