Valerian (herb) some affinity for the GABA receptor, a class of receptors on which benzodiazepines are known to act. Valeric acid, which is responsible for the typical odor of mostly older valerian roots, does not have any sedative properties. Valeric acid is related to valproic acid, a widely prescribed anticonvulsant; valproic acid is a derivative of valeric acid. Valerian also contains isovaltrate, which has been shown to be an inverse agonist for adenosine A receptor sites. This action likely does not contribute to the herb's possible sedative effects, which would be expected from an agonist, rather than an inverse agonist, at this
Valerian and the City of a Thousand Planets often seems more 19th- than 26th-century, notably in a sequence where Laureline is captured by members of a hostile species and forced to don a white dress to be presented to their emperor. The blobby computer-generated creatures resemble natives from the most racist of "Tarzan" movies." Despite the film being a disappointment at the box office, director Luc Besson claims a sequel is still possible due to positive fan reaction. Valerian and the City of a Thousand Planets Valerian and the City of a Thousand Planets () is a 2017 English-language French 3D space opera film written and directed by