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Herb

California Poppy

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California Poppy. Mild sedative with anxiolytic and analgesic activity.

How it works. Protopine alkaloids enhance GABA binding and inhibit monoamine oxidase weakly.

What the research supports. 1 graded claims. Strongest: Improves sleep onset latency (limited).

How much to take. Typical dose: 80–320 mg extract.

Side effects and interactions. 1 medication interaction listed. No serious side effects listed at normal doses.

Stacking. Pairs well with Magnesium glycinate, L-theanine.

Common forms. Available as Standardized extract capsule, Liquid tincture (alcohol or glycerin), Powdered whole herb, Traditional decoction or tea.

Key studies. 8 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried California Poppy. Anecdotes are not medical advice.

California Poppy. Mild sedative with anxiolytic and analgesic activity.

Key compound: californidineC21H22ClNO3 · 371.9 g/mol

What it is

Mild sedative with anxiolytic and analgesic activity.

Also called

Eschscholzia californica

Food sources

Whole dried plant material (root, leaf, flower, or aerial parts depending on the species)Standardized hydroethanolic or aqueous extract (capsule, tincture, or tea)Powdered traditional preparation used in Ayurvedic, TCM, or Western herbal practice

Goals

How it works

Protopine alkaloids enhance GABA binding and inhibit monoamine oxidase weakly.

Pathways

  • Protopine alkaloids enhance GABA binding
  • inhibit monoamine oxidase weakly

Effects

  • +sleep onset latency supports

What the research supports

Improves sleep onset latencylimited

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
80–320 mg extract
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodEvening
Best formMost evidence is based on the standardized extract capsule form.
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Side effects & interactions

Common side effects

  • Drowsiness

Medication interactions

Prescription medications (general)minor

Always disclose California Poppy use to your prescriber — additive, antagonistic, or pharmacokinetic interactions are possible.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

Common forms

  • Standardized extract capsule
  • Liquid tincture (alcohol or glycerin)
  • Powdered whole herb
  • Traditional decoction or tea

Key studies

8 studies cited in total.

PubMed: California Poppy — Improves sleep onset latency ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching California Poppy and "Improves sleep onset latency". Filter by RCT, meta-analysis, or year on the results page.

PubMed: California Poppy — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching California Poppy and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

PubMed: California Poppy — meta-analysis ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching California Poppy and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

Discussion

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