Passionflower

Supplements · Sleep & Calming Herbs · Supplement, Typed Supps

A calming herb traditionally used for anxiety and sleep.

Stage by stage

Intake (Extract capsule or tea): Active compounds absorbed in the small intestine.
Small intestine (Absorbed): Absorbed alongside other plant compounds.
Bloodstream (Crosses into the brain): Circulates and reaches the brain.
GABA system (Mild calming effect): Interacts with the brain’s calming GABA system, similar to valerian, though generally mild.

What the evidence supports

Reducing anxiety — limited evidence. A Cochrane review found too few good-quality trials to draw firm conclusions, though several small studies point in a favourable direction.
Improving sleep — limited evidence. Small studies suggest a modest increase in total sleep time, but effects on falling and staying asleep are mixed.

Typical dose

Varies by preparation; trials have used around 90 mg tablets, 500 mg of extract, or tinctures

Upper limit: No established UL; safety beyond short-term use is not well characterised

Timing

Evening, before bed.

Time to effect

Same evening: For some, with more consistent effects reported with regular use.

Medication interactions

Sedatives and CNS depressants (e.g. benzodiazepines, alcohol): Additive drowsiness and sedation. (moderate)

Common myth

“Passionflower is as strong as prescription anti-anxiety medication.” In reality: Its studied effects are generally mild — not comparable in strength to prescription options.