03/09/2026
Passionflower: when the nervous system needs help finding the brakes.
Passiflora incarnata has a long history of use for nervous tension, restlessness and sleep disturbance — and its effects may be partly explained by its influence on GABAergic signalling.
GABA is the brain’s major inhibitory neurotransmitter, helping regulate neuronal excitability and allowing the nervous system to shift out of heightened arousal.
Passionflower may be particularly useful when stress shows up as:
• feeling wired but tired
• difficulty switching off
• nervous tension
• mental restlessness
• disrupted sleep
The interesting part? Calming the nervous system isn’t necessarily about sedation. It’s about supporting the mechanisms that help the brain regulate excitation and return to a more settled state.
As always with herbal medicine, context matters — the right herb, dose and combination depend on the individual, their medications and the wider clinical picture.
A remarkably complicated-looking flower for a herb traditionally used to help quiet things down.