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Anecdotal reports claim that valerian is also attractive to ratsso much so that it had been used to bait traps.
en.wikipedia.org Purified valerian extract has undergone multiple studies and appears to be modestly effective.
en.wikipedia.org Moreover, as a natural, unregulated product, the concentration, contents, and presence of contaminants in valerian preparations can not be easily determined.
en.wikipedia.org The very limited animal and human data do not allow a conclusion as to the safety of valerian during pregnancy.
en.wikipedia.org In rare cases, valerian may cause an allergic reaction, typically as a skin rash, hives, or difficulty breathing.
en.wikipedia.org