Drug interactions
Alprazolam + Phentermine
Severity: Minor
Alprazolam and Phentermine: 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
Phentermine is a sympathomimetic stimulant and alprazolam is a sedative, so they may partly counteract each other. No significant pharmacokinetic interaction is established.
What this interaction means in plain words
Alprazolam and Phentermine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Alprazolam belongs to Central Nervous System; Phentermine belongs to Central Nervous System.
Why it happens
Opposing CNS stimulant and depressant effects; no established mechanism of significant interaction.
What to do
No routine adjustment is needed; monitor for changes in anxiety, insomnia or sedation.
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?
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Other interactions of Alprazolam
- Alprazolam + Calcium / magnesium / potassium / sodium oxybates Contraindicated
- Alprazolam + Itraconazole Contraindicated
- Alprazolam + Ketoconazole Contraindicated
- Alprazolam + Levoketoconazole Contraindicated
- Alprazolam + Sodium oxybate Contraindicated
- Alfentanil + Alprazolam Major
Frequently asked questions
Can I take Alprazolam with Phentermine?
MediHelp rates the interaction as minor. Alprazolam and Phentermine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Phentermine is a sympathomimetic stimulant and alprazolam is a sedative, so they may partly counteract each other. No significant pharmacokinetic interaction is established.
How serious is the interaction between Alprazolam and Phentermine?
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 adjustment is needed; monitor for changes in anxiety, insomnia or sedation.
What other medicines interact with Alprazolam?
MediHelp also lists interactions of Alprazolam with, for example, Calcium / magnesium / potassium / sodium oxybates, Itraconazole, Ketoconazole. The full list is on the Alprazolam page.
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