Drug interactions
Escitalopram + Phentermine
Severity: Moderate
Escitalopram and Phentermine: 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
Phentermine is a sympathomimetic with some monoamine-releasing activity, and combining it with an SSRI may increase the risk of serotonin syndrome. Reports are limited and the risk is considered modest.
What this interaction means in plain words
Escitalopram and Phentermine 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.
Escitalopram belongs to Central Nervous System; Phentermine belongs to Central Nervous System.
Why it happens
Possible additive serotonergic effects; the mechanism is not firmly established.
What to do
Monitor for agitation, tremor, tachycardia and hyperthermia, especially at initiation or dose increases. Stop phentermine if serotonin syndrome is suspected.
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 Escitalopram
- Cisapride + Escitalopram Contraindicated
- Citalopram + Escitalopram Contraindicated
- Escitalopram + Isocarboxazid Contraindicated
- Escitalopram + Methylene blue Contraindicated
- Escitalopram + Phenelzine Contraindicated
- Escitalopram + Pimozide Contraindicated
Other interactions of Phentermine
- Isocarboxazid + Phentermine Contraindicated
- Linezolid + Phentermine Contraindicated
- Phenelzine + Phentermine Contraindicated
- Phentermine + Procarbazine Contraindicated
- Phentermine + Rasagiline Contraindicated
- Phentermine + Selegiline Contraindicated
Frequently asked questions
Can I take Escitalopram with Phentermine?
MediHelp rates the interaction as moderate. Escitalopram and Phentermine 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. Phentermine is a sympathomimetic with some monoamine-releasing activity, and combining it with an SSRI may increase the risk of serotonin syndrome. Reports are limited and the risk is considered modest.
How serious is the interaction between Escitalopram and Phentermine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for agitation, tremor, tachycardia and hyperthermia, especially at initiation or dose increases. Stop phentermine if serotonin syndrome is suspected.
What other medicines interact with Escitalopram?
MediHelp also lists interactions of Escitalopram with, for example, Cisapride, Citalopram, Isocarboxazid. The full list is on the Escitalopram page.
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