What is Passionflower Extract?

Passionflower Extract is an herbal extract made from Passiflora incarnata, traditionally used to support relaxation, mild anxiety, and sleep. Its calming effects may relate to activity in the GABA system.

Does Passionflower Extract help with anxiety?

It may reduce symptoms of mild anxiety and nervousness in some people. Evidence suggests calming effects, but responses vary and it is not a substitute for prescribed treatment when needed.

Can Passionflower Extract improve sleep?

It may help with sleep quality and falling asleep, especially for mild insomnia or stress-related sleep difficulty. Effects are typically subtle and may work best when taken consistently for a short period.

What is a typical dosage for Passionflower Extract?

Common supplemental amounts are about 300–900 mg per day, depending on extract strength and product directions. Start at the low end to assess tolerance.

Who should avoid Passionflower Extract or use caution?

Use caution if you are pregnant or breastfeeding, or if you take sedatives, sleep medications, or other calming supplements due to additive drowsiness. Consult a clinician if you have a medical condition or take prescription medicines.

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Passionflower
Extract

Moderate study situation·7/10

A higher score indicates better study conditions, but not necessarily effectiveness.

Herbal extract from Passiflora incarnata traditionally used for anxiety and sleep support with moderate evidence for calming effects.

Sleep Improvement Stress Relief ADHS Anxiety Relief

dose range

300–900 mg

Divide total daily dose into 2–3 doses, or take as tea before bed for sleep.

Consumption

Take capsules or liquid extracts with or without food. For sleep, passionflower tea (1 gram dried herb) before bedtime is common.

Not fat-soluble.

Best time

Doses for anxiety may be taken throughout the day, while sleep-focused use is best pre-bedtime.

Description

Passionflower extract is derived from the Passiflora incarnata plant and has been used for centuries as a herbal remedy for anxiety, insomnia, and mild stress. Its calming effects are believed to be mediated by increasing gamma-aminobutyric acid (GABA) in the brain.

benefits

Main effects with level of evidence

Moderate

Note on evidence

Moderate-quality clinical trials show benefits for mild anxiety and sleep, but research is limited and heterogeneous.

Reduces symptoms of mild anxiety and nervousness

Moderate

Passionflower extract has demonstrated anxiolytic effects in several randomized controlled trials, with efficacy comparable to some prescription anxiolytics for generalized anxiety disorder, and fewer impairment side effects.

Particularly relevant for: Adults with mild anxiety · Individuals experiencing stress

S1 · Akhondzadeh et al., 2001 (PubMed)S4 · WebMD Passionflower S5 · NCCIH Passionflower

Improves sleep quality and onset

Moderate

Passionflower extract and tea may increase total sleep time and improve sleep quality, particularly in people with mild insomnia or difficulty maintaining sleep.

Particularly relevant for: Adults with trouble falling or staying asleep

S2 · Ngan & Conduit, 2011 (PubMed)S4 · WebMD Passionflower S5 · NCCIH Passionflower

May support symptom reduction in ADHD (as adjunct)

Limited

Studies suggest passionflower may help reduce hyperactivity and improve attention in children with ADHD when used alongside standard treatment, though more research is needed.

Particularly relevant for: Children/adolescents with ADHD (with clinical guidance)

S3 · Salehi et al., 2010 (PubMed)

Safety & Information

Important safety information & known risks

For educational purposes only • not medical advice

Generally well-tolerated for short-term use, but excessive doses or interactions with sedatives may be dangerous.

warning notices

Short-term use in recommended doses is considered safe for most adults.
Side effects are usually mild but can include dizziness, confusion, or sedation.
Avoid during pregnancy due to potential uterine stimulant effects.
Potential for rare allergic or liver reactions.
Avoid use during pregnancy due to possible uterine stimulation and miscarriage risk.
Avoid with prescription sedatives, barbiturates, or benzodiazepines to prevent excessive sedation.
Do not use before operating heavy machinery or driving until individual response is known.
Use with caution in people with liver disease due to rare potential for hepatotoxicity.

Known interactions with medications

benzodiazepines
barbiturates
opioids
alcohol

Contraindications / special precautions

Pregnancy
Concurrent use with strong sedative medications or alcohol

interactions

Important interactions between active ingredient ↔ supplement / medication / food

May potentiate sedative medications and depressants; minor interactions possible with other CNS agents.

May increase sedative effects of benzodiazepines.

drug · Benzodiazepines

AvoidModerate

Why

Both passionflower and benzodiazepines depress CNS activity, raising risk of excessive sedation, respiratory depression.

recommendation

Avoid combining unless supervised by a clinician.

S4 · WebMD PassionflowerS6 · Natural Medicines Database

Concurrent use may dangerously increase CNS depression.

drug · Barbiturates

AvoidModerate

Why

Additive CNS depressant effects may lead to sedation and impaired function.

recommendation

Avoid combining unless advised by a healthcare provider.

S4 · WebMD PassionflowerS6 · Natural Medicines Database

Alcohol may increase drowsiness from passionflower.

drug · Alcohol

AvoidLimited

Why

Combined sedative effects can impair motor skills, mental alertness.

recommendation

Do not use with alcohol.

S4 · WebMD Passionflower S5 · NCCIH Passionflower

mechanisms of action

Brief explanations of how it works

Enhancement of GABAergic transmission

Passionflower extract is believed to increase gamma-aminobutyric acid (GABA) levels in the brain, reducing neuronal excitability and promoting relaxation.

S1 · Akhondzadeh et al., 2001 (PubMed)S5 · NCCIH Passionflower