Passiflora caerulea (Passiflora caerulea): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does Passiflora caerulea work as a sedative?

Passiflora caerulea exerts sedative effects primarily through its flavonoid content, including vitexin and chrysin, which appear to modulate GABA receptors in the brain. The herb also contains beta-carboline alkaloids that may contribute to its calming properties. These compounds work synergistically to produce mild sedation and anxiolytic effects without the strong hypnotic action of pharmaceutical sedatives. The evidence level for this mechanism is rated C, based primarily on in vitro and animal studies rather than human clinical trials.

Does Passiflora caerulea interact with any medications?

Passiflora caerulea may interact with central nervous system depressants, including benzodiazepines, barbiturates, and other sedative medications. Concurrent use can potentiate drowsiness and sedation, increasing the risk of excessive drowsiness or respiratory depression. The herb should not be combined with alcohol or other CNS depressants without medical supervision. Evidence for these interactions is rated Level C, based on pharmacological reasoning and traditional use rather than formal interaction studies.

What is the recommended dosage for Passiflora caerulea tea?

The traditional adult dosage for Passiflora caerulea tea is 1-2 teaspoons of dried herb per cup, taken up to three times daily. To prepare, steep the herb in boiling water for 10-15 minutes before straining. For sleep support, taking a cup 30-60 minutes before bedtime is commonly recommended. This dosage recommendation is based on traditional use and pharmacopoeial standards, with evidence rated Level C. Individual responses may vary, and users should start with lower doses to assess tolerance.

Is Passiflora caerulea safe to take during pregnancy?

No, Passiflora caerulea is considered unsafe during pregnancy and should be avoided. The herb contains beta-carboline alkaloids that may stimulate uterine contractions, potentially risking miscarriage or premature labor. Additionally, the sedative compounds can cross the placental barrier and may affect fetal development. Traditional contraindications and pharmacological evidence (Level C) both advise against use during pregnancy. Women who are pregnant or attempting to conceive should consult a healthcare provider before using any herbal preparations.

What is Passiflora caerulea used for medicinally?

Passiflora caerulea is traditionally used as a mild sedative and nervine for anxiety reduction and sleep support. Originating in South American traditional medicine, it was later adopted in European folk medicine for its calming properties. The herb is also used as an antispasmodic for muscle tension and nervous restlessness. Unlike stronger pharmaceutical sedatives, Passiflora caerulea provides gentle relaxation without significant morning grogginess in most users. Evidence for these uses is rated Level C, based on traditional use and preliminary research rather than extensive clinical trials.

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 30 PubMed articles · model: gemma4:31b

Summary

Passiflora caerulea, also known as the blue passionflower, is a medicinal plant native to Brazil with documented antioxidant, anti-inflammatory, and anticonvulsant properties [PMID:33628899, 29844775, 38999571].

Background

Passiflora caerulea is a tropical fruit and medicinal plant native to Brazil [PMID:33628899]. It is characterized by a complex corona structure and climbing tendrils that utilize a two-phasic mechanism for spring formation involving lignification and turgor pressure [PMID:21613065, 37544907].

Traditional uses

It is commonly used in traditional medicine in South America for various pathologies associated with the gastrointestinal tract [PMID:27596328].

Active compounds

Identified compounds include the flavone chrysin [PMID:34985375], $\beta$-carboline alkaloids (norharmane, harmane, harmine, harmol, harmaline, and harmalol) [PMID:37448143], and polyphenols such as ginsenoside, naringenin, chrysoeriol 8-c-glucoside, luteolin-6-C-glucoside, and apigenin-6,8-di-C-$\beta$-D-glucopyranoside [PMID:31728889]. Other components include $\beta$-sitosterol, palmitoleic acid, and various amino acids like histidine and tryptophan [PMID:38999571].

Mechanism of action

Chrysin, isolated from P. caerulea, impairs genomic stability in breast cancer cells by suppressing DNA double-strand break repair and inhibiting the recruitment of NHEJ factor 53BP1 and HR factor RAD51 [PMID:34985375].

Clinical evidence

Evidence DExperimental Colitis

Ethanolic extract of P. caerulea demonstrated beneficial properties in an experimental colitis model related to inflammatory bowel disease [PMID:27596328]

Evidence DPhysiological Chronic Stress

An infusion of Melissa officinalis and Passiflora caerulea (200 mg/kg) in mice resulted in lower plasma corticosterone levels [PMID:23844268]

Evidence DEpileptic Seizures and Cognitive Deficit

Aqueous fruit extract (PCAE) at 100 and 200 mg/kg in pilocarpine-induced epileptic mice delayed the onset of convulsions and improved alteration scores in the Y-maze test [PMID:31728889]

Evidence DMale Virility (Aging)

Administration of chrysin (1 mg/kg) to 2-year-old male rats led to increased libido, sperm count, fertilization potential, and litter size [PMID:12511112]

Evidence DGeneral Inflammation/Pain

Ethanolic leaf extracts showed potency as an anticonvulsant (63% relative to carbamazepine), analgesic (70% relative to indomethacin), and anti-inflammatory (90% relative to indomethacin) [PMID:29844775]

Evidence summary

The current evidence is based primarily on in vitro studies and animal models (mice and rats), indicating promising pharmacological activities, but there are no human clinical trials provided in the source material.

PubMed sources

1.PMID: 21613065 (2011) — B- and C-class gene expression during corona development of the blue passionflower (Passiflora caerulea, Passifloraceae). · American journal of botany
2.PMID: 38266002 (2024) — Machine learning-mediated Passiflora caerulea callogenesis optimization. · PloS one
3.PMID: 29161583 (2018) — Chrysin: Sources, beneficial pharmacological activities, and molecular mechanism of action. · Phytochemistry
4.PMID: 27596328 (2016) — Beneficial properties of Passiflora caerulea on experimental colitis. · Journal of ethnopharmacology
5.PMID: 37544907 (2023) — Force Generation in the Coiling Tendrils of Passiflora caerulea. · Advanced science (Weinheim, Baden-Wurttemberg, Germany)

Passiflora caerulea

Sources & Citations

Calculate a safe dose of Passiflora caerulea