Assertion: ketamine's effect | /r/CapableOf | last for one week
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Source sentences:
text: Some small studies have been done which found that a single dose of ketamine was able to improve treatment resistant depression after just a few hours with the effects lasting for one week.
text: Those findings have been replicated, such as a 2014 clinical trial of 41 patients, who saw their PTSD symptoms diminish within 24 hours, an effect that lasted for two weeks.