Drug interactions
Atenolol + Methyclothiazide
Severity: Minor
Atenolol and Methyclothiazide: 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 are commonly combined with beta-blockers for hypertension and have additive blood pressure effects. Thiazides can cause hypokalemia and may modestly worsen glucose and lipid control.
What this interaction means in plain words
Atenolol and Methyclothiazide 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 effect; thiazide-induced potassium loss with no major pharmacokinetic interaction.
What to do
Monitor blood pressure, serum potassium and blood glucose periodically.
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?
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Other interactions of Atenolol
- Amifostine + Atenolol Major
- Amiodarone + Atenolol Major
- Atenolol + Atenolol-chlorthalidone Major
- Atenolol + Betaxolol Major
- Atenolol + Bisoprolol Major
- Atenolol + Carvedilol Major
Frequently asked questions
Can I take Atenolol with Methyclothiazide?
MediHelp rates the interaction as minor. Atenolol and Methyclothiazide 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 are commonly combined with beta-blockers for hypertension and have additive blood pressure effects. Thiazides can cause hypokalemia and may modestly worsen glucose and lipid control.
How serious is the interaction between Atenolol and Methyclothiazide?
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, serum potassium and blood glucose periodically.
What other medicines interact with Atenolol?
MediHelp also lists interactions of Atenolol with, for example, Amifostine, Amiodarone, Atenolol-chlorthalidone. The full list is on the Atenolol page.
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