Drug interactions
Fentanyl iontophoretic transdermal system + Loxapine
Severity: Major
Fentanyl iontophoretic transdermal system and Loxapine: major 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
Loxapine and fentanyl both depress the central nervous system. Used together they can cause additive sedation, respiratory depression and hypotension. Opioid labeling advises caution with other CNS depressants including antipsychotics.
What this interaction means in plain words
Fentanyl iontophoretic transdermal system and Loxapine 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.
Why it happens
Additive central nervous system and respiratory depression from opioid agonism combined with antipsychotic sedative and antihistaminic effects.
What to do
Monitor sedation level, respiratory rate and blood pressure, particularly at initiation or dose changes. Use the lowest effective doses and counsel patients to avoid alcohol and other depressants.
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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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 Fentanyl iontophoretic transdermal system with Loxapine?
MediHelp rates the interaction as major. Fentanyl iontophoretic transdermal system and Loxapine 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 and fentanyl both depress the central nervous system. Used together they can cause additive sedation, respiratory depression and hypotension. Opioid labeling advises caution with other CNS depressants including antipsychotics.
How serious is the interaction between Fentanyl iontophoretic transdermal system and Loxapine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor sedation level, respiratory rate and blood pressure, particularly at initiation or dose changes. Use the lowest effective doses and counsel patients to avoid alcohol and other depressants.
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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