Drug interactions
Chloral hydrate + Pentazocine
Severity: Major
Chloral hydrate and Pentazocine: major interaction.
Last updated Sources: US FDA label
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
Chloral hydrate is a sedative-hypnotic, and combined use with an opioid can cause profound sedation and respiratory depression. The risk is greater in children, older adults and those with airway compromise.
What this interaction means in plain words
Chloral hydrate and Pentazocine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Chloral hydrate belongs to Central Nervous System; Pentazocine belongs to Musculoskeletal.
Why it happens
Additive CNS and respiratory depression from opioid activity and GABAergic effects of trichloroethanol.
What to do
Avoid if possible; otherwise reduce doses and monitor respiration, oxygen saturation and consciousness. Ensure resuscitative equipment is available.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Pentazocine
- Calcium / magnesium / potassium / sodium oxybates + Pentazocine Contraindicated
- Olanzapine / samidorphan + Pentazocine Contraindicated
- Pentazocine + Phenelzine Contraindicated
- Pentazocine + Tranylcypromine Contraindicated
- Alfentanil + Pentazocine Major
- Alprazolam + Pentazocine Major
Other interactions of Chloral hydrate
- Calcium / magnesium / potassium / sodium oxybates + Chloral hydrate Contraindicated
- Chloral hydrate + Sodium oxybate Contraindicated
- Alfentanil + Chloral hydrate Major
- Alprazolam + Chloral hydrate Major
- Amobarbital + Chloral hydrate Major
- Belladonna and opium + Chloral hydrate Major
Frequently asked questions
Can I take Chloral hydrate with Pentazocine?
MediHelp rates the interaction as major. Chloral hydrate and Pentazocine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Chloral hydrate is a sedative-hypnotic, and combined use with an opioid can cause profound sedation and respiratory depression. The risk is greater in children, older adults and those with airway compromise.
How serious is the interaction between Chloral hydrate and Pentazocine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid if possible; otherwise reduce doses and monitor respiration, oxygen saturation and consciousness. Ensure resuscitative equipment is available.
What other medicines interact with Pentazocine?
MediHelp also lists interactions of Pentazocine with, for example, Calcium / magnesium / potassium / sodium oxybates, Olanzapine / samidorphan, Phenelzine. The full list is on the Pentazocine page.
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