Drug interactions
Isoproterenol + Trifluoperazine
Severity: Moderate
Isoproterenol and Trifluoperazine: 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
Isoproterenol raises heart rate and can provoke arrhythmias, while trifluoperazine may cause QT prolongation and orthostatic hypotension. Combined use may increase the risk of tachyarrhythmia and hypotension in predisposed patients.
What this interaction means in plain words
Isoproterenol and Trifluoperazine 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 pharmacodynamic effects: beta-adrenergic chronotropy and vasodilation with phenothiazine QT prolongation and alpha-blockade.
What to do
Monitor ECG and blood pressure, and correct potassium and magnesium abnormalities before and during co-use.
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 Isoproterenol
Frequently asked questions
Can I take Isoproterenol with Trifluoperazine?
MediHelp rates the interaction as moderate. Isoproterenol and Trifluoperazine 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. Isoproterenol raises heart rate and can provoke arrhythmias, while trifluoperazine may cause QT prolongation and orthostatic hypotension. Combined use may increase the risk of tachyarrhythmia and hypotension in predisposed patients.
How serious is the interaction between Isoproterenol and Trifluoperazine?
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 ECG and blood pressure, and correct potassium and magnesium abnormalities before and during co-use.
What other medicines interact with Isoproterenol?
MediHelp also lists interactions of Isoproterenol with, for example, Adrenaline-articaine, Bisoprolol, Budesonide-formoterol. The full list is on the Isoproterenol page.
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