The short answer
Ask your prescriber before adding melatonin to chlordiazepoxide. Melatonin product information supports an alertness precaution, but it does not quantify this exact combination’s risk.
What this answer covers
Oral melatonin; prolonged-release product guidance is distinct from immediate-release supplements.
- Supplement or preparation
- Melatonin
- Medication ingredient
- chlordiazepoxide
Why adding melatonin needs review
The prolonged-release melatonin information cautions that benzodiazepine sedation may be enhanced. Chlordiazepoxide itself can impair alertness, so the prescriber should review the reason for adding another sleep product.
A study with another medicine has limits
A small surgical study found comparable sedation with alprazolam plus melatonin and alprazolam alone. That is useful context, but it did not test this medicine or long-term use at home.
Product and timing matter
Tell the prescriber whether the melatonin is immediate- or prolonged-release and list its dose and other ingredients. These sources do not establish a protective dosing gap.
Watch for impaired alertness
Chlordiazepoxide can affect alertness and coordination. Avoid driving if affected. Seek urgent help for severe difficulty waking or breathing, and tell the prescriber about alcohol, opioids and all other sedating products.
Evidence and practical considerations
Side effects & toxicity
Conditional sedation review is supported by melatonin product guidance and the exact medication CNS warning.
- Exact scope
- Oral melatonin; prolonged-release product guidance is distinct from immediate-release supplements. with Exact oral chlordiazepoxide hydrochloride capsules. Long elimination half-life and slow decline after discontinuation; this label does not quantify St John’s wort enzyme induction. RxNorm IN 2356 relates to PIN 203173 hydrochloride, matching the labeled active ingredient. No combination product used.
- Medication form and route
- oral
- Timing or duration
- Source-specific single-dose, repeated-dose and observational exposures distinguished.
What remains uncertain
- No exact co-use study established by these sources. A short alprazolam trial is indirect, not a safety guarantee.
Factors that may matter: preparation and plant part; clinical indication; dose; other medicines; baseline alertness.
Read the supporting source summaries
Source 1: current product label
dailymed.nlm.nih.gov · Source check Sep 10, 2026
Population: Patients prescribed oral chlordiazepoxide.
Can impair alertness and coordination; other CNS depressants can increase impairment. Opioid combinations have a specific respiratory-depression warning. Dependence and withdrawal require supervised changes. Long elimination half-life and slow decline after discontinuation; this label does not quantify St John’s wort enzyme induction. RxNorm IN 2356 relates to PIN 203173 hydrochloride, matching the labeled active ingredient. No combination product used.
How this applies: Exact IN and labeled oral formulation; route, salt and metabolite distinctions retained.
No quantified risk for every herb or universal protective spacing interval. Opioid-specific evidence does not prove equal botanical respiratory risk.
Source 2: product label
medicines.org.uk · Source check Sep 10, 2026
Population: People considering the specified supplement.
Prolonged-release melatonin product information cautions that benzodiazepine sedation may be enhanced. Its measured interaction study involved zolpidem.
How this applies: Preparation-specific class precaution, not a directly measured interaction with chlordiazepoxide.
Class precaution and a zolpidem study, not direct evidence for this exact benzodiazepine. Immediate-release and prolonged-release preparations differ.
Source 3: original human study
pubmed.ncbi.nlm.nih.gov · Source check Sep 10, 2026
Population: Eighty selected surgical patients, twenty per arm.
Measured sedation and amnesia were comparable between combination and alprazolam alone.
How this applies: Original named medication and preparation only; indirect evidence for chlordiazepoxide. Comparator arms are not coadministration.
Small perioperative study, not powered for adverse events and not a chronic at-home safety test; exclusions included obesity and neuropsychiatric disease. Some pairwise significance reporting is internally inconsistent, so no superiority claim is relied on.
Research assessment: · Open full citations ↗
Review and change history
- Publication status
- Published research summary
- Clinical review
- Not yet recorded
| Date | Update |
|---|---|
| Article prepared | |
| Current exact available claims adjudicated using original captures and explicit identity and comparator limits. | |
| Research summary published |
Article revision: 5c2d8f62503c19dd
This guide brings together the evidence records used by our interaction checker. Each finding retains its own preparation limits, research date, and source summaries.
Full citations require verification. Reading this answer and the source summaries does not.
Taking other supplements or medications?
Use the checker to explore your other combinations. Ask a pharmacist to review the exact products, amounts and medical conditions in your complete list.
Open the interaction checkerInformation, not medical advice. Do not change prescribed treatment based on this guide.