Health - Ketamine safe in clinical research.... ?

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Hi. I've found some research that says that Ketamine, has no long term effects, for participants with schizophrenia, in psychiatric research.

I wondered, if anyone can come up with any infomation, on the similarity/difference between drug effects in the lab versus recreational use.

Someone has suggested, that though it may be safe to use in psychiatric research, it may not be safe (have no long term effect on the course of the illness), in recreational use.

Thanks

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