French maritime pine bark extract significantly lowers the requirement for analgesic medication in dysmenorrhea: a multicenter, randomized, double-blind, placebo-controlled study.
OBJECTIVE
A previous open study demonstrated that French maritime pine bark extract (Pycnogenol) may soothe menstrual pain in dysmenorrhea. We thus investigated the effects of Pycnogenol on menstrual pain in a double-blind study.


METHODS
Subjects were 116 women aged 18-48 years. The first 2 menstrual cycles served as a control period; during the subsequent 2 menstrual cycles women received either a Pycnogenol supplement (60 mg/day) or a placebo in identical capsule form. One further cycle was monitored after cessation of capsule administration. Women were assigned to either a group with low menstrual pain or a group with dysmenorrhea. The criterion for assignment to the first group was absence of analgesic medication.


RESULTS
In women with low menstrual pain, no significant difference for lowering of pain scores was found. In contrast, women with dysmenorrhea had a significantly lower pain score and required statistically significantly less analgesic medication during supplementation with Pycnogenol. The number of days women required analgesic medication was likewise found to be statistically significantly lowered in the Pycnogenol group. Even after discontinuation of Pycnogenol supplementation, the required analgesic medication remained significantly decreased.


CONCLUSIONS
The analgesic-sparing effect of Pycnogenol increases with duration of supplementation and benefits persist even after discontinuation.
Suzuki
Nobutaka
N
Department of Complementary and Alternative Medicine, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa, Japan. pcam@med.kanazawa-u.ac.jp
Uebaba
Kazuo
K
Kohama
Takafumi
T
Moniwa
Nobuhiko
N
Kanayama
Naohiro
N
Koike
Koji
K
D000293:Adolescent; D000328:Adult; D000700:Analgesics / Q000008:administration & dosage*; D004311:Double-Blind Method; D004412:Dysmenorrhea / Q000188:drug therapy*; D005260:Female; D005419:Flavonoids / Q000627:therapeutic use*; D006801:Humans; D007564:Japan; D008875:Middle Aged; D010147:Pain Measurement; D010936:Plant Extracts; D010975:Platelet Aggregation Inhibitors / Q000627:therapeutic use*; D011788:Quality of Life; D016896:Treatment Outcome
D000700:Analgesics; D005419:Flavonoids; D010936:Plant Extracts; D010975:Platelet Aggregation Inhibitors; C024070:pycnogenols