Leaf & Herb · Herb
Passionflower
Strong Evidenceherb3 PubMed Studies
Hermetica Superfood Encyclopedia
Passionflower contains chrysin and vitexin flavonoids that enhance GABA neurotransmitter activity in the brain. This herbal supplement reduces anxiety and promotes relaxation without causing drowsiness or cognitive impairment.
Indigenous to the southeastern United States, particularly the subtropical regions of Florida and the Gulf Coast. Now cultivated in tropical and temperate climates worldwide, including parts of South America, Europe, and Asia.
Research on Passionflower, native to Indigenous to the southeastern United States, has been documented in the scientific literature. Phytochemical analysis has identified essential oils, flavonoids, and other bioactive terpenoids. Antimicrobial activity has been demonstrated against common pathogens in vitro. Drying methods have been compared for their effect on bioactive retention. Drying methods have been compared for their effect on bioactive retention.
- Flavonoids (e.g., vitexin, isovitexin): Anxiolytic and neuroprotective properties. - Alkaloids (e.g., harman, harmine): Mildly sedative and calming. - GABA (gamma-aminobutyric acid): Inhibitory neurotransmitter that reduces excitability and promotes relaxation. - Antioxidants: Protect against oxidative stress and inflammation in neural tissues.
Passionflower's bioactive compounds chrysin, vitexin, and isovitexin bind to benzodiazepine receptors and enhance GABA-A receptor activity in the central nervous system. The flavonoids also inhibit monoamine oxidase, increasing availability of mood-regulating neurotransmitters like serotonin and dopamine. Additionally, passionflower compounds provide neuroprotection through antioxidant activity and modulation of inflammatory cytokines.
A randomized controlled trial of 60 participants found passionflower extract (45 drops daily) reduced anxiety scores by 20% compared to placebo over 4 weeks. Another study of 182 adults showed passionflower tea improved sleep quality scores by 15% after 7 days. A double-blind trial comparing passionflower to oxazepam found equivalent anti-anxiety effects with 45mg daily doses. However, most studies are small-scale and short-term, requiring larger long-term trials for definitive efficacy confirmation.
Passionflower is generally well-tolerated with mild side effects including drowsiness, dizziness, and nausea in less than 5% of users. It may enhance effects of sedative medications including benzodiazepines, barbiturates, and sleep aids, requiring dosage adjustments. Passionflower can increase bleeding risk when combined with anticoagulant drugs like warfarin. Pregnant and breastfeeding women should avoid passionflower due to insufficient safety data and potential uterine stimulant effects.
7 documented interactions for Passionflower. Click any row to read the full explanation. Always consult your healthcare provider before combining supplements with medications.
Passionflower adds to the sedating effects of Xanax — you may become excessively drowsy.
What to do: Use caution if combining. Reduce doses. Do not drive. Inform your doctor about herbal supplement use.
Timing: Caution with sedating botanicals. Valerian, kava, passionflower, and hops all enhance GABA activity — the same pathway Alprazolam acts on. This can cause excessive sedation. If using calming herbs, take them at a different time and start with very low doses. Stimulating adaptogens are safer with benzodiazepines.
Full interaction details →Passionflower adds to Ativan sedation.
What to do: Use caution. Avoid driving.
Timing: Caution with sedating botanicals. Valerian, kava, passionflower, and hops all enhance GABA activity — the same pathway Lorazepam acts on. This can cause excessive sedation. If using calming herbs, take them at a different time and start with very low doses. Stimulating adaptogens are safer with benzodiazepines.
Full interaction details →Passionflower adds to Klonopin sedation.
What to do: Use caution. Avoid driving.
Timing: Caution with sedating botanicals. Valerian, kava, passionflower, and hops all enhance GABA activity — the same pathway Clonazepam acts on. This can cause excessive sedation. If using calming herbs, take them at a different time and start with very low doses. Stimulating adaptogens are safer with benzodiazepines.
Full interaction details →Passionflower adds to Valium sedation.
What to do: Use caution.
Timing: Caution with sedating botanicals. Valerian, kava, passionflower, and hops all enhance GABA activity — the same pathway Diazepam acts on. This can cause excessive sedation. If using calming herbs, take them at a different time and start with very low doses. Stimulating adaptogens are safer with benzodiazepines.
Full interaction details →Passionflower may increase drowsiness and breathing problems with opioids.
What to do: Use caution. Inform prescriber about herbal use.
Timing: Take Hydrocodone exactly as prescribed. Passionflower can be taken with a meal at a different time. Sedating botanicals (valerian, kava, passionflower) can amplify opioid sedation and respiratory depression. Stimulating adaptogens (rhodiola, ginseng) may be safer choices during opioid therapy.
Full interaction details →Taking passionflower with Ambien causes excessive sedation.
What to do: Choose one or the other for sleep support. Do not combine.
Timing: Take Zolpidem as prescribed. Passionflower can typically be taken with a meal at a different time. As a general rule, space botanicals 1-2 hours from prescription medications. St. John's Wort is the most interaction-prone botanical — it affects dozens of drugs via CYP enzyme induction. Always inform your prescriber about herbal supplements.
Full interaction details →Passionflower intensifies alcohol sedation effects.
What to do: Reduce alcohol intake or avoid passionflower on drinking occasions.
Timing: Food generally improves botanical absorption and reduces GI irritation. Alcohol pairs naturally with Passionflower. Some foods enhance botanical bioavailability — black pepper with turmeric, healthy fats with fat-soluble herbs. Others (high-tannin teas) may reduce absorption of certain plant compounds.
Full interaction details →Educational information only. Always consult a qualified healthcare provider before changing your supplement or medication regimen.
Botanical sleep complex with Reishi, L-Theanine & Chamomile.
