Drug interactions
Diazepam + Trifluoperazine
Severity: Moderate
Diazepam and Trifluoperazine: 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
Both drugs depress the CNS, so combining them increases drowsiness, impaired coordination and possible hypotension. The antipsychotic may also lower the seizure threshold, which is relevant when diazepam is used for seizure control.
What this interaction means in plain words
Diazepam and Trifluoperazine 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 CNS depression through GABA-A potentiation and dopamine and adrenergic receptor blockade.
What to do
Monitor sedation and blood pressure and use the lowest effective doses; counsel on avoiding driving.
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 Diazepam
Frequently asked questions
Can I take Diazepam with Trifluoperazine?
MediHelp rates the interaction as moderate. Diazepam and Trifluoperazine 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. Both drugs depress the CNS, so combining them increases drowsiness, impaired coordination and possible hypotension. The antipsychotic may also lower the seizure threshold, which is relevant when diazepam is used for seizure control.
How serious is the interaction between Diazepam and Trifluoperazine?
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 sedation and blood pressure and use the lowest effective doses; counsel on avoiding driving.
What other medicines interact with Diazepam?
MediHelp also lists interactions of Diazepam with, for example, Calcium / magnesium / potassium / sodium oxybates, Alfentanil, Alprazolam. The full list is on the Diazepam page.
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