A developmental toxicity-screening test of valerian

Area of Science:

• Pharmacology
• Reproductive Toxicology
• Ethnobotany

Background:

• Valerian (Valeriana Officinallis) is traditionally used for anxiety and insomnia.
• Its use during pregnancy is often contraindicated, but lacks scientific evidence.
• This study addresses the knowledge gap regarding valerian's reproductive safety.

Purpose of the Study:

• To investigate the reproductive and developmental effects of a specific Valerian extract in a rat model.
• To assess potential adverse outcomes on fertility, fetal development, and maternal health.

Main Methods:

• Female rats were administered a Valerian extract (MediHerb) orally during specific gestation periods (GD 1-8 or 8-15).
• Fetuses, placentae, and ovaries were collected on GD 20 for examination.
• In vitro embryo culture was used to assess direct toxicity of the extract.

Main Results:

• No adverse effects on fertility or fetal development were observed in the in vivo study.
• Maternal toxicity was not evident at the tested doses.
• Valerian extract demonstrated toxicity in an in vitro embryo culture system at a concentration of 6 microl/ml.

Conclusions:

• The specific Valerian extract tested did not negatively impact rat reproduction or fetal development, even at doses up to 65 times the human equivalent.
• The low pH of this extract might mitigate the toxicity of certain compounds (epoxides).
• Different Valerian preparations, especially those rich in valepotriates, may yield different reproductive outcomes.