Drug interactions
Alprazolam + Haloperidol
Severity: Moderate
Alprazolam and Haloperidol: 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
Combining a benzodiazepine with haloperidol can cause additive sedation and psychomotor slowing. The pairing is often used deliberately in acute agitation, but it requires attention to respiratory and cardiovascular status.
What this interaction means in plain words
Alprazolam and Haloperidol 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.
Alprazolam belongs to Central Nervous System; Haloperidol belongs to Central Nervous System.
Why it happens
Additive CNS depression from GABA-A potentiation and dopamine D2 blockade with sedative effects.
What to do
Use the lowest effective doses and monitor level of consciousness, respiration and blood pressure, especially with parenteral dosing. Warn ambulatory patients about impaired alertness.
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 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 Haloperidol?
MediHelp rates the interaction as moderate. Alprazolam and Haloperidol 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. Combining a benzodiazepine with haloperidol can cause additive sedation and psychomotor slowing. The pairing is often used deliberately in acute agitation, but it requires attention to respiratory and cardiovascular status.
How serious is the interaction between Alprazolam and Haloperidol?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lowest effective doses and monitor level of consciousness, respiration and blood pressure, especially with parenteral dosing. Warn ambulatory patients about impaired alertness.
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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