Drug interactions
Isoproterenol + Phentermine
Severity: Moderate
Isoproterenol and Phentermine: 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
Phentermine is a sympathomimetic that can raise heart rate and blood pressure. With isoproterenol, additive cardiac stimulation may cause tachycardia, palpitations or arrhythmia.
What this interaction means in plain words
Isoproterenol and Phentermine 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 belongs to Respiratory; Phentermine belongs to Central Nervous System.
Why it happens
Additive sympathomimetic effects: phentermine releases norepinephrine while isoproterenol directly stimulates beta-receptors.
What to do
Monitor heart rate, blood pressure and ECG when used together. Avoid phentermine in patients with significant cardiac disease requiring isoproterenol.
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
Other interactions of Phentermine
- Isocarboxazid + Phentermine Contraindicated
- Linezolid + Phentermine Contraindicated
- Phenelzine + Phentermine Contraindicated
- Phentermine + Procarbazine Contraindicated
- Phentermine + Rasagiline Contraindicated
- Phentermine + Selegiline Contraindicated
Frequently asked questions
Can I take Isoproterenol with Phentermine?
MediHelp rates the interaction as moderate. Isoproterenol and Phentermine 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. Phentermine is a sympathomimetic that can raise heart rate and blood pressure. With isoproterenol, additive cardiac stimulation may cause tachycardia, palpitations or arrhythmia.
How serious is the interaction between Isoproterenol and Phentermine?
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 heart rate, blood pressure and ECG when used together. Avoid phentermine in patients with significant cardiac disease requiring isoproterenol.
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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