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Average of the change in side effects over the course of the study visit, as compared to predrug administration. Scale is 0–4, with 0 = no change and 4 = very bothersome. Change in following Side Effects Rating Scale for Dissociate Anesthetics (SERSDA) items are presented fatigue and generalized discomfort, which temporarily improved after ketamine administration and dizziness, nausea, and a feeling of unreality, which temporarily worsened (changes not statistically significant)
