Drug interactions
Cyclopenthiazide + Nadolol
Severity: Moderate
Cyclopenthiazide and Nadolol: 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
Both agents lower blood pressure, so the combination can be effective but may produce additive hypotension. The thiazide can cause hypokalemia and impair glucose tolerance, and the beta blocker may mask hypoglycemic symptoms.
What this interaction means in plain words
Cyclopenthiazide and Nadolol 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 antihypertensive pharmacodynamic effects, with thiazide-induced electrolyte and metabolic changes.
What to do
Monitor blood pressure, serum potassium and glucose when starting or changing doses. Adjust doses if hypotension or electrolyte disturbance develops.
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 Nadolol
Frequently asked questions
Can I take Cyclopenthiazide with Nadolol?
MediHelp rates the interaction as moderate. Cyclopenthiazide and Nadolol 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. Both agents lower blood pressure, so the combination can be effective but may produce additive hypotension. The thiazide can cause hypokalemia and impair glucose tolerance, and the beta blocker may mask hypoglycemic symptoms.
How serious is the interaction between Cyclopenthiazide and Nadolol?
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 blood pressure, serum potassium and glucose when starting or changing doses. Adjust doses if hypotension or electrolyte disturbance develops.
What other medicines interact with Nadolol?
MediHelp also lists interactions of Nadolol with, for example, Acebutolol, Adrenaline-articaine, Amifostine. The full list is on the Nadolol page.
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