Drug interactions
Amitriptyline + Pseudoephedrine
Severity: Moderate
Amitriptyline and Pseudoephedrine: 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
Pseudoephedrine acts largely indirectly by releasing norepinephrine, and tricyclic antidepressants block its uptake into adrenergic neurons, which may reduce its effect, while also potentiating direct adrenergic actions. Unpredictable changes in blood pressure and heart rate, and arrhythmias, can result. Patients with cardiovascular disease are most at risk.
What this interaction means in plain words
Amitriptyline and Pseudoephedrine 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.
Amitriptyline belongs to Central Nervous System; Pseudoephedrine belongs to Respiratory.
Why it happens
Tricyclic blockade of norepinephrine reuptake and uptake of indirect sympathomimetics alters adrenergic response.
What to do
Avoid pseudoephedrine in patients with hypertension or heart disease. Otherwise monitor blood pressure and heart rate and use the lowest dose for the shortest time.
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 Pseudoephedrine
- Isocarboxazid + Pseudoephedrine Contraindicated
- Phenelzine + Pseudoephedrine Contraindicated
- Pseudoephedrine + Rasagiline Contraindicated
- Pseudoephedrine + Selegiline Contraindicated
- Pseudoephedrine + Selegiline transdermal Contraindicated
- Pseudoephedrine + Tranylcypromine Contraindicated
Other interactions of Amitriptyline
- Amitriptyline + Isocarboxazid Contraindicated
- Amitriptyline + Methylene blue Contraindicated
- Amitriptyline + Phenelzine Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amitriptyline + Procarbazine Contraindicated
- Amitriptyline + Safinamide Contraindicated
Frequently asked questions
Can I take Amitriptyline with Pseudoephedrine?
MediHelp rates the interaction as moderate. Amitriptyline and Pseudoephedrine 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. Pseudoephedrine acts largely indirectly by releasing norepinephrine, and tricyclic antidepressants block its uptake into adrenergic neurons, which may reduce its effect, while also potentiating direct adrenergic actions. Unpredictable changes in blood pressure and heart rate, and arrhythmias, can result. Patients with cardiovascular disease are most at risk.
How serious is the interaction between Amitriptyline and Pseudoephedrine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid pseudoephedrine in patients with hypertension or heart disease. Otherwise monitor blood pressure and heart rate and use the lowest dose for the shortest time.
What other medicines interact with Pseudoephedrine?
MediHelp also lists interactions of Pseudoephedrine with, for example, Isocarboxazid, Phenelzine, Rasagiline. The full list is on the Pseudoephedrine page.
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