Drug interactions
Methyclothiazide + Pirbuterol
Severity: Moderate
Methyclothiazide and Pirbuterol: 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
Thiazide diuretics cause renal potassium loss, and beta-2 agonists drive potassium into cells. Together they can produce clinically relevant hypokalemia, raising the risk of arrhythmias, especially with high-dose or frequent beta-agonist use.
What this interaction means in plain words
Methyclothiazide and Pirbuterol 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 renal potassium wasting and beta-2 mediated cellular potassium uptake.
What to do
Monitor serum potassium and magnesium and supplement as needed, particularly in patients with cardiac disease or on digoxin.
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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Frequently asked questions
Can I take Methyclothiazide with Pirbuterol?
MediHelp rates the interaction as moderate. Methyclothiazide and Pirbuterol 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. Thiazide diuretics cause renal potassium loss, and beta-2 agonists drive potassium into cells. Together they can produce clinically relevant hypokalemia, raising the risk of arrhythmias, especially with high-dose or frequent beta-agonist use.
How serious is the interaction between Methyclothiazide and Pirbuterol?
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 serum potassium and magnesium and supplement as needed, particularly in patients with cardiac disease or on digoxin.
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