Passionflower: Sleep Evidence and Safety

The relevant botanical is Passiflora incarnata. EMA’s assessment covers specified preparations of its dried above-ground parts, including teas, powders and extracts. It does not treat every passionflower species, passion fruit food or multi-ingredient blend as the same intervention.^{See reference 5}

In the 2020 insomnia trial, some measures improved from baseline in the passionflower group but were not better than placebo. The comparison between groups is the relevant test of an added treatment effect. A positive sleep-time finding does not make every sleep outcome positive.^{See reference 2}

The 2024 trial reported no adverse effects during its 30-day observation. That is useful but cannot exclude uncommon harms or establish safety with prolonged use, pregnancy or interacting medicines.^{See reference 3}

The systematic review found that many small trials reported reduced anxiety, but studies lasted at most 30 days and used varied tests. Research around a stressful procedure is not automatically evidence for managing a persistent anxiety disorder.^{See reference 4}

NCCIH regards conclusions about anxiety as uncertain. It also cautions that passionflower can interact with anesthesia; a pre-procedure study is not an instruction to take it before surgery.^{See reference 1}

EMA’s public assessment describes relief of mild mental stress and support for sleep on a traditional-use basis. It explicitly says clinical trials were insufficient for firm conclusions. A traditional-use designation should therefore not be read as proof from large, convincing trials.^{See reference 5}

A tea, liquid extract and dry extract can differ in how the plant is prepared. EMA describes extraction with a solvent and different resulting preparations. A milligram amount for one extract is not a general instruction for another product.^{See reference 5}

The summaries reviewed here do not establish a single effective dose for all commercial products. Record the exact botanical, plant part, preparation and other ingredients before comparing a label with a study. This page does not recommend a personal dose.^{See reference 2,See reference 3,See reference 5}

Possible effects include sleepiness, dizziness and confusion. Tell the care team about passionflower before surgery because combining it with anesthesia or other perioperative medicines may overly suppress the nervous system.^{See reference 1}

NCCIH advises against use during pregnancy because uterine contractions may occur. Breastfeeding safety is poorly understood. Check medicines and individual circumstances with a pharmacist or clinician before use.^{See reference 1}

Independent product testing can help assess identity, composition and contaminants. It does not guarantee that a supplement works or is safe for a particular person. A blend also introduces ingredients not tested as passionflower alone.^{See reference 5,See reference 6}