Drug interactions
Methyclothiazide + Tiotropium-olodaterol
Severity: Moderate
Methyclothiazide and Tiotropium-olodaterol: 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 waste potassium, and beta2 agonists such as olodaterol shift potassium into cells. Together they can cause hypokalemia, which may predispose to arrhythmias, particularly in patients with hypoxia or heart disease.
What this interaction means in plain words
Methyclothiazide and Tiotropium-olodaterol 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 lowering of serum potassium through renal loss and intracellular shift.
What to do
Check serum potassium and magnesium at baseline and periodically. Replace potassium if low, especially in patients with cardiac disease or other QT-prolonging drugs.
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 Tiotropium-olodaterol
Frequently asked questions
Can I take Methyclothiazide with Tiotropium-olodaterol?
MediHelp rates the interaction as moderate. Methyclothiazide and Tiotropium-olodaterol 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 waste potassium, and beta2 agonists such as olodaterol shift potassium into cells. Together they can cause hypokalemia, which may predispose to arrhythmias, particularly in patients with hypoxia or heart disease.
How serious is the interaction between Methyclothiazide and Tiotropium-olodaterol?
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 magnesium at baseline and periodically. Replace potassium if low, especially in patients with cardiac disease or other QT-prolonging drugs.
What other medicines interact with Tiotropium-olodaterol?
MediHelp also lists interactions of Tiotropium-olodaterol with, for example, Amisulpride, Arformoterol, Arsenic trioxide. The full list is on the Tiotropium-olodaterol page.
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