Drug interactions
Dextromethorphan + Loxapine
Severity: Minor
Dextromethorphan and Loxapine: minor 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
Dextromethorphan has serotonergic activity, and combining it with an antipsychotic could theoretically contribute to serotonin toxicity or neuroleptic malignant syndrome. Clinical reports are very rare, and the risk is mainly theoretical.
What this interaction means in plain words
Dextromethorphan and Loxapine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Dextromethorphan belongs to Respiratory; Loxapine belongs to Central Nervous System.
Why it happens
Theoretical additive serotonergic and dopaminergic effects; the mechanism is not firmly established.
What to do
No routine dose change is needed; counsel the patient to report fever, rigidity, tremor or confusion promptly.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Dextromethorphan and Loxapine, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Dextromethorphan
- Dextromethorphan + Isocarboxazid Contraindicated
- Dextromethorphan + Linezolid Contraindicated
- Dextromethorphan + Phenelzine Contraindicated
- Dextromethorphan + Rasagiline Contraindicated
- Dextromethorphan + Safinamide Contraindicated
- Dextromethorphan + Selegiline Contraindicated
Other interactions of Loxapine
- Alfentanil + Loxapine Major
- Alprazolam + Loxapine Major
- Amisulpride + Loxapine Major
- Amoxapine + Loxapine Major
- Apomorphine + Loxapine Major
- Belladonna and opium + Loxapine Major
Frequently asked questions
Can I take Dextromethorphan with Loxapine?
MediHelp rates the interaction as minor. Dextromethorphan and Loxapine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Dextromethorphan has serotonergic activity, and combining it with an antipsychotic could theoretically contribute to serotonin toxicity or neuroleptic malignant syndrome. Clinical reports are very rare, and the risk is mainly theoretical.
How serious is the interaction between Dextromethorphan and Loxapine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine dose change is needed; counsel the patient to report fever, rigidity, tremor or confusion promptly.
What other medicines interact with Dextromethorphan?
MediHelp also lists interactions of Dextromethorphan with, for example, Isocarboxazid, Linezolid, Phenelzine. The full list is on the Dextromethorphan page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
