Effects of Ketamine
Ketamine's effects are felt within 30 seconds to 20 minutes of infusion and can last for 45 to 90 minutes. These effects can be short-term or long-term and side effects include dream-like feelings, blurred vision, muscle movements, nausea, vomiting, and sleep problems.
Regular users can have long term effects such as :
flashbacks
mood and personality changes
depression
problems with memory and concentration
psychosis