Though you wouldn't know if from TFA, Sacks was also a life-long enthusiast of mind-altering substances[0]. His 2012 Hallucinations[1] inquires into the etiology and social and phenomenal aspects of its subject by examining cases from his patients and from his own recreational episodes and is a completely fascinating read!
0: See, for example, https://www.npr.org/2020/09/21/915224016/neurologist-oliver-...
> During the following 10 years or so, Sacks took a prodigious amount of amphetamines and psychotropics – “every dose an overdose” – with one trip producing visions of the “neurological heavens” so intense it inspired him to write his first book, Migraine (1970).
That time frame matches the NPR episode you cited:
> One chapter, called "Altered States," described his own experiments with mind-altering drugs in the '60s when he was a neurology resident.
Hallucinations has quite a bit of info on Sacks' career as a psychonaut which progressed over several decades (iirc).