Drug interactions
Thiothixene + Venlafaxine
Severity: Moderate
Thiothixene 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
Venlafaxine's serotonergic action combined with dopamine blockade by thiothixene may increase the risk of serotonin syndrome or neuroleptic malignant syndrome. Both are uncommon but serious.
What this interaction means in plain words
Thiothixene 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.
Why it happens
Additive serotonergic effects with dopamine D2 receptor blockade.
What to do
Monitor for tremor, clonus, hyperthermia, rigidity and mental status change, especially when starting or adjusting doses. Discontinue the agents and give supportive care if either 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 Venlafaxine
- Isocarboxazid + Venlafaxine Contraindicated
- Methylene blue + Venlafaxine Contraindicated
- Phenelzine + Venlafaxine Contraindicated
- Procarbazine + Venlafaxine Contraindicated
- Rasagiline + Venlafaxine Contraindicated
- Safinamide + Venlafaxine Contraindicated
Frequently asked questions
Can I take Thiothixene with Venlafaxine?
MediHelp rates the interaction as moderate. Thiothixene 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. Venlafaxine's serotonergic action combined with dopamine blockade by thiothixene may increase the risk of serotonin syndrome or neuroleptic malignant syndrome. Both are uncommon but serious.
How serious is the interaction between Thiothixene 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: Monitor for tremor, clonus, hyperthermia, rigidity and mental status change, especially when starting or adjusting doses. Discontinue the agents and give supportive care if either syndrome is suspected.
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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