> Studies done on the negative heath consequences for recreational users are largely irrelevant to medically prescribed users, because your average recreational

> Studies done on the negative heath consequences for recreational users are largely irrelevant to medically prescribed users, because your average recreational dose is an order of magnitude (or more) higher than the average prescribed dose. Increase the dose ten-told, it acts like a different drug altogether. What you're saying applies in other cases, but in the case of ketamine, the recreational dose is one or two orders of magnitude lower than the clinical dose.