Drug interactions
Fluphenazine + Metaproterenol
Severity: Minor
Fluphenazine and Metaproterenol: minor 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
Metaproterenol is a beta2-agonist that can cause tachycardia and hypokalemia, and fluphenazine can prolong the QT interval. The combination may modestly raise arrhythmia risk in susceptible patients; no meaningful sedation interaction is established.
What this interaction means in plain words
Fluphenazine and Metaproterenol have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Possible additive cardiac effects from beta2-agonist hypokalemia and tachycardia combined with phenothiazine QT prolongation.
What to do
No routine change is needed; monitor heart rate and potassium in patients with cardiac disease or when high doses are used.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Fluphenazine
- Arsenic trioxide + Fluphenazine Contraindicated
- Dofetilide + Fluphenazine Contraindicated
- Fluphenazine + Ibutilide Contraindicated
- Fluphenazine + Pimozide Contraindicated
- Adagrasib + Fluphenazine Major
- Alfentanil + Fluphenazine Major
Frequently asked questions
Can I take Fluphenazine with Metaproterenol?
MediHelp rates the interaction as minor. Fluphenazine and Metaproterenol have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Metaproterenol is a beta2-agonist that can cause tachycardia and hypokalemia, and fluphenazine can prolong the QT interval. The combination may modestly raise arrhythmia risk in susceptible patients; no meaningful sedation interaction is established.
How serious is the interaction between Fluphenazine and Metaproterenol?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine change is needed; monitor heart rate and potassium in patients with cardiac disease or when high doses are used.
What other medicines interact with Fluphenazine?
MediHelp also lists interactions of Fluphenazine with, for example, Arsenic trioxide, Dofetilide, Ibutilide. The full list is on the Fluphenazine page.
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