Drug interactions
Gabapentin + Venlafaxine
Severity: Moderate
Gabapentin and Venlafaxine: 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
Gabapentin causes sedation, dizziness and, rarely, respiratory depression, particularly in older or respiratory-compromised patients. Venlafaxine can also cause dizziness and somnolence, so the combination may add to CNS effects, though serious respiratory depression is uncommon without other depressants.
What this interaction means in plain words
Gabapentin and Venlafaxine 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.
Gabapentin belongs to Central Nervous System; Venlafaxine belongs to Central Nervous System.
Why it happens
Additive central nervous system depressant effects.
What to do
Start gabapentin at a low dose and titrate slowly, monitoring for sedation, dizziness and respiratory depression. Take extra care in the elderly, in COPD, and with opioids.
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 Venlafaxine
- Isocarboxazid + Venlafaxine Contraindicated
- Methylene blue + Venlafaxine Contraindicated
- Phenelzine + Venlafaxine Contraindicated
- Procarbazine + Venlafaxine Contraindicated
- Rasagiline + Venlafaxine Contraindicated
- Safinamide + Venlafaxine Contraindicated
Other interactions of Gabapentin
Frequently asked questions
Can I take Gabapentin with Venlafaxine?
MediHelp rates the interaction as moderate. Gabapentin and Venlafaxine 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. Gabapentin causes sedation, dizziness and, rarely, respiratory depression, particularly in older or respiratory-compromised patients. Venlafaxine can also cause dizziness and somnolence, so the combination may add to CNS effects, though serious respiratory depression is uncommon without other depressants.
How serious is the interaction between Gabapentin and Venlafaxine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Start gabapentin at a low dose and titrate slowly, monitoring for sedation, dizziness and respiratory depression. Take extra care in the elderly, in COPD, and with opioids.
What other medicines interact with Venlafaxine?
MediHelp also lists interactions of Venlafaxine with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Venlafaxine page.
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