Drug interactions
Mirtazapine + Saquinavir
Severity: Moderate
Mirtazapine and Saquinavir: 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
Saquinavir inhibits CYP3A4, which may increase mirtazapine exposure. Both agents can also prolong the QT interval, raising the risk of arrhythmia.
What this interaction means in plain words
Mirtazapine and Saquinavir 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
CYP3A4 inhibition raising mirtazapine levels plus additive QT prolongation.
What to do
Obtain a baseline ECG and monitor QTc, and correct electrolyte abnormalities. Consider reducing the mirtazapine dose if sedation or adverse effects emerge.
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 Mirtazapine
- Isocarboxazid + Mirtazapine Contraindicated
- Mirtazapine + Phenelzine Contraindicated
- Mirtazapine + Pimozide Contraindicated
- Mirtazapine + Procarbazine Contraindicated
- Mirtazapine + Rasagiline Contraindicated
- Mirtazapine + Selegiline Contraindicated
Frequently asked questions
Can I take Mirtazapine with Saquinavir?
MediHelp rates the interaction as moderate. Mirtazapine and Saquinavir 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. Saquinavir inhibits CYP3A4, which may increase mirtazapine exposure. Both agents can also prolong the QT interval, raising the risk of arrhythmia.
How serious is the interaction between Mirtazapine and Saquinavir?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain a baseline ECG and monitor QTc, and correct electrolyte abnormalities. Consider reducing the mirtazapine dose if sedation or adverse effects emerge.
What other medicines interact with Mirtazapine?
MediHelp also lists interactions of Mirtazapine with, for example, Isocarboxazid, Phenelzine, Pimozide. The full list is on the Mirtazapine page.
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