[Venous constriction by local administration of ruscus extract]

Area of Science:

• Pharmacology
• Vascular Biology
• Dermatology

Background:

• Ruscus extract is traditionally used for venous insufficiency.
• Previous studies suggested venoconstrictive properties but lacked direct measurement.
• Understanding percutaneous absorption is key to topical efficacy.

Purpose of the Study:

• To directly measure the venoconstrictive action of topical Ruscus extract.
• To evaluate the percutaneous absorption of Ruscus extract.
• To compare the effects of Ruscus extract cream with a placebo.

Main Methods:

• Randomized, double-blind, placebo-controlled study.
• 18 healthy volunteers.
• Duplex B-scan ultrasonography to measure femoral vein diameter.
• Topical application of Ruscus extract cream (64-96 mg extract) or placebo.

Main Results:

• Topical Ruscus extract cream significantly decreased femoral vein diameter by 1.25 mm (median) within 2.5 hours.
• Placebo cream increased femoral vein diameter by 0.5 mm (mean).
• The observed decrease indicates effective percutaneous absorption of the active substance (p = 0.014).

Conclusions:

• Topical Ruscus extract demonstrates direct, measurable venoconstrictive action.
• The study provides direct evidence of Ruscus extract's efficacy and percutaneous absorption.
• This method offers a direct alternative to indirect plethysmographic assessments for venoconstrictive effects.