Metoprolol and hydrochlorothiazide and Triamterene interaction
Metoprolol and hydrochlorothiazide and Triamterene: both prescribing labels describe an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Triamterene (Dyrenium) label · effective 2024-12-05
If the ECG shows no widening of the QRS or arrhythmia in the presence of hyperkalemia, it is usually sufficient to discontinue Dyrenium (triamterene) and any potassium supplementation, and substitute a thiazide alone.
Drug Interactions Caution should be used when lithium and diuretics are used concomitantly because diuretic-induced sodium loss may reduce the renal clearance of lithium and increase serum lithium levels with risk of lithium toxicity.
The effects of the following drugs may be potentiated when given together with triamterene: antihypertensive medication, other diuretics, preanesthetic and anesthetic agents, skeletal muscle relaxants (non-depolarizing).
From the Metoprolol and hydrochlorothiazide (METOPROLOL TARTRATE AND HYDROCHLOROTHIAZIDE) label · effective 2025-01-22
If such symptoms occur, increase diuretics and restore clinical stability before advancing the dose of metoprolol.
Non-Steroidal Anti-Inflammatory Drugs (NSAIDs): Reduced diuretic, natriuretic, and antihypertensive effects of diuretics.
Lithium : Diuretics reduce the renal clearance of lithium and increase the risk of lithium toxicity.
Non-Steroidal Anti-Inflammatory Drugs : NSAIDs can reduce the diuretic, natriuretic, and antihypertensive effects of thiazide diuretics.
Because of its relative beta 1 cardio-selectivity, however, metoprolol tartrate may be used in patients with bronchospastic disease who do not respond to, or cannot tolerate, other antihypertensive treatment.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.