On-line version ISSN 1657-9534
OLAYA, María del Pilar et al. Evaluation of the acute and subchronic oral toxicity of ethanol extract from Valeriana pavonii species in Wistar rats. Colomb. Med. [online]. 2010, vol.41, n.3, pp. 256-266. ISSN 1657-9534.
Introduction: One of the most frequent problems found in medicinal plants is the absence of clinical, toxicological, and pharmacological studies. Valeriana pavonii is one of the species used in Colombia as an anxiolytic. Further study of this specie is rendered to add information in the toxicological area. Objective: The acute and subchronic oral toxicity of V. pavonii ethanolic extract was evaluated in Wistar rats of both sexes. Materials and methods: The rats were distributed into four groups: the control group received the vehicle (0. 5 mL/100 g of corporal weight) and the other three groups received increasing levels of the dosage for 90 days to evaluate characteristics like physical exam, laboratory test (blood chemistry and haematology), and anatomopathological findings. Results: This study reveals that there were no signs of toxicity, mortality, or significant alterations attributable to the ethanolic extract of V. pavonii. Conclusions: The Not Observed Adverse Effect Levels (NOAEL) of V. pavonii ethanolic extract were 2000 and 1000 mg/kg of body weight for the acute and subchronic toxicity studies, respectively.
Keywords : Toxicity tests; LOAEL; Valerian; NOAEL; Anxiolytic; Medicinal plants.