The short answer
Avoid adding kava to temazepam without prescriber review. Kava guidance advises against combining it with sedating substances.
What this answer covers
Oral Piper methysticum products; extract, dose and additional sedatives matter.
- Supplement or preparation
- Piper methysticum
- Medication ingredient
- temazepam
Why the precaution applies
NCCIH advises against kava with sedative substances. Temazepam is a hypnotic that can impair alertness and coordination, so adding kava warrants explicit review.
Benefit and combination safety are different
A controlled study did not find its kava preparation better than placebo for the primary anxiety outcome. It did not test safety with temazepam.
Do not rely on spacing
A few hours between doses has not been shown to protect against combined impairment. Describe the exact kava product and any regular use to the prescriber.
Protect your alertness
Temazepam can impair coordination and alertness. Avoid driving when affected. Seek urgent help for severe difficulty waking or breathing, and tell the prescriber about all other sedating medicines and alcohol.
Evidence and practical considerations
Side effects & toxicity
Conditional avoid/review precaution follows exact temazepam CNS effects and official kava guidance; risk magnitude is unmeasured.
- Exact scope
- Oral Piper methysticum products; extract, dose and additional sedatives matter. with Exact oral temazepam; no blanket benzodiazepine metabolic or route transfer.
- Medication form and route
- oral; other cannabis routes only if explicitly discussed
- Timing or duration
- Exact duration and dose depend on source; single-dose and chronic use are distinguished.
What remains uncertain
- No exact controlled co-use study or validated interval. Negative anxiety efficacy is not proof of no sedating effect.
Factors that may matter: preparation and plant part; dose; other medicines; baseline alertness; clinical indication.
Read the supporting source summaries
Source 1: current product label
dailymed.nlm.nih.gov · Source check Sep 10, 2026
Population: Patients prescribed oral temazepam.
CNS depression, impaired coordination and alertness can occur; concomitant CNS depressants require caution. Dependence and withdrawal risks require individualized tapering rather than abrupt cessation. Metabolized primarily through conjugation with no active metabolites; not an alprazolam CYP3A profile. Complex sleep behaviors can occur and CNS depressants may increase their risk.
How this applies: Exact RxNorm ingredient and oral formulation confirmed in original label; use exact indication and metabolic boundaries.
Does not quantify the requested botanical interaction risks, prove every herb is sedating, or establish a protective supplement interval.
Source 2: official guidance
nccih.nih.gov · Source check Sep 10, 2026
Population: People considering the specified supplement.
Advises against use with sedative substances. Kava may cause dizziness and has been linked to rare severe liver injury, including with different extraction methods.
How this applies: Preparation-specific context; not a directly measured temazepam interaction.
Not a temazepam study. Intrinsic liver risk does not establish added temazepam hepatotoxicity; preparation and co-exposure vary.
Source 3: randomized placebo-controlled trial
pubmed.ncbi.nlm.nih.gov · Source check Sep 10, 2026
Population: 391 adults randomized to three groups in an internet-based trial.
Neither active intervention improved its primary anxiety or insomnia outcome more than placebo.
How this applies: Preparation-specific context; not a directly measured temazepam interaction.
Not both active botanicals together, not temazepam co-use. Accessible abstract does not fully characterize dose and preparation; efficacy result is not proof of combination safety.
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 claims adjudicated against captured originals and explicit comparator/co-use boundaries. | |
| Research summary published |
Article revision: 144ef683935a0b9a
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.