Drug interactions
Hydrochlorothiazide-losartan + Norepinephrine
Severity: Moderate
Hydrochlorothiazide-losartan and Norepinephrine: 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
Norepinephrine can shift potassium into cells through beta-2 stimulation and hydrochlorothiazide promotes potassium loss, so hypokalemia may be additive. Norepinephrine also raises blood pressure, directly opposing the antihypertensive effect, though it is used in monitored acute settings.
What this interaction means in plain words
Hydrochlorothiazide-losartan and Norepinephrine 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 potassium lowering from beta-adrenergic cellular uptake and thiazide renal loss; pharmacodynamic antagonism of antihypertensive effects.
What to do
Monitor serum potassium and ECG in patients on infusion, and replace potassium as needed; expect hemodynamic variability and hold the oral antihypertensive during shock.
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 Hydrochlorothiazide-losartan
- Aliskiren + Hydrochlorothiazide-losartan Contraindicated
- Dofetilide + Hydrochlorothiazide-losartan Contraindicated
- Hydrochlorothiazide-losartan + Sparsentan Contraindicated
- Aceclofenac + Hydrochlorothiazide-losartan Major
- Aldesleukin + Hydrochlorothiazide-losartan Major
- Amifostine + Hydrochlorothiazide-losartan Major
Frequently asked questions
Can I take Hydrochlorothiazide-losartan with Norepinephrine?
MediHelp rates the interaction as moderate. Hydrochlorothiazide-losartan and Norepinephrine 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. Norepinephrine can shift potassium into cells through beta-2 stimulation and hydrochlorothiazide promotes potassium loss, so hypokalemia may be additive. Norepinephrine also raises blood pressure, directly opposing the antihypertensive effect, though it is used in monitored acute settings.
How serious is the interaction between Hydrochlorothiazide-losartan and Norepinephrine?
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 ECG in patients on infusion, and replace potassium as needed; expect hemodynamic variability and hold the oral antihypertensive during shock.
What other medicines interact with Hydrochlorothiazide-losartan?
MediHelp also lists interactions of Hydrochlorothiazide-losartan with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Hydrochlorothiazide-losartan page.
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