Drug interactions
Loxapine + Safinamide
Severity: Major
Loxapine and Safinamide: major interaction.
Last updated Sources: US FDA label
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
Loxapine blocks dopamine D2 receptors and can counteract safinamide's antiparkinsonian effect. Parkinsonian symptoms may worsen.
What this interaction means in plain words
Loxapine and Safinamide can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Loxapine belongs to Central Nervous System; Safinamide belongs to Central Nervous System.
Why it happens
Pharmacodynamic antagonism between D2 receptor blockade and dopaminergic therapy.
What to do
Avoid loxapine in patients treated for Parkinson disease; use quetiapine, clozapine or pimavanserin if an antipsychotic is needed. Monitor motor symptoms.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Loxapine
- Alfentanil + Loxapine Major
- Alprazolam + Loxapine Major
- Amisulpride + Loxapine Major
- Amoxapine + Loxapine Major
- Apomorphine + Loxapine Major
- Belladonna and opium + Loxapine Major
Other interactions of Safinamide
- Amitriptyline + Safinamide Contraindicated
- Amoxapine + Safinamide Contraindicated
- Amphetamine polistirex + Safinamide Contraindicated
- Clomipramine + Safinamide Contraindicated
- Cyclobenzaprine + Safinamide Contraindicated
- Desipramine + Safinamide Contraindicated
Frequently asked questions
Can I take Loxapine with Safinamide?
MediHelp rates the interaction as major. Loxapine and Safinamide can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Loxapine blocks dopamine D2 receptors and can counteract safinamide's antiparkinsonian effect. Parkinsonian symptoms may worsen.
How serious is the interaction between Loxapine and Safinamide?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid loxapine in patients treated for Parkinson disease; use quetiapine, clozapine or pimavanserin if an antipsychotic is needed. Monitor motor symptoms.
What other medicines interact with Loxapine?
MediHelp also lists interactions of Loxapine with, for example, Alfentanil, Alprazolam, Amisulpride. The full list is on the Loxapine page.
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