Scopoletin

Scopoletin relaxes uterine and vascular smooth muscle through direct pharmacologic action. Traditional use for dysmenorrhea and threatened miscarriage supported by in vitro studies demonstrating spasmolytic activity.

Antispasmodic on smooth muscle in vitro; anti-inflammatory via multiple pathways; contributes to anticoagulant activity

Anti-inflammatory coumarin documented in multiple plant species with antispasmodic and antioxidant activity.

Scopoletin has demonstrated dose-dependent inhibition of COX-2-mediated prostaglandin E2 synthesis in RAW 264.7 macrophage cultures, with IC50 values of approximately 18 µM. Anti-inflammatory activity in carrageenan-induced paw edema models in rats showed 35–45% inhibition at 50 mg/kg doses. Its contribution to the overall anti-inflammatory profile of nettle root extract has not been isolated in clinical trials, but in vitro HPLC-quantified extracts correlate scopoletin content with inhibition of inflammatory biomarkers in cell assays.

Animal studies have confirmed scopoletin's anti-inflammatory and smooth muscle relaxant properties, with blood pressure-lowering effects demonstrated in hypertensive rat models. A small number of human studies using noni juice as a whole preparation (not isolating scopoletin) suggest modest antihypertensive effects in hypertensive smokers. The compound's contribution to noni's overall bioactivity remains unclear given complex pharmacokinetics in whole-fruit preparations.

Scopoletin is well-characterised across multiple botanical sources (passionflower, ashwagandha, kava) and its anti-inflammatory, spasmolytic, and antimicrobial properties are consistently demonstrated in vitro. In the context of Pelargonium sidoides, it contributes to the bronchodilatory and anti-inflammatory components of EPs® 7630's clinical profile, complementing the primary coumarin umckalin.

MAO inhibition documented in vitro — contributes to mood-modulating effects. Smooth muscle relaxant properties.

Scopoletin is a minor coumarin in nettle contributing to antioxidant and anti-inflammatory profile. Demonstrates antimicrobial and weak anticoagulant activity; synergistic with other nettle constituents for overall efficacy.

Scopoletin contributes to anti-inflammatory and detoxifying profile. In vitro studies confirm activity through multiple pathways.