Altered States   
http://fusionanomaly.net/alteredstates.html

From Wikipedia, the free encyclopedia. 
http://en2.wikipedia.org/wiki/Altered_States

Altered States is the only novel (ISBN 0060107278) and last film 
written by Paddy Chayefsky.
Both novel and film are based on Dr. John C. Lilly's sensory 
deprivation research conducted in isolation tanks and sometimes 
under the influence of drugs like LSD. Although Chayefsky never
contacted Lilly directly, he liked the film version, and noted 
the following in an Omni magazine interview published in 
January 1983: 

	The scene in which the scientist becomes cosmic energy 
	and his wife grabs him and brings him back to human 
	form is straight out of my Dyadic Cyclone 
	(1976, ISBN 067122218X). 

	As for the scientist's regression into an ape-like 
	being, the late Dr. Craig Enright, who started me 
	on K (ketamine) while taking a trip with me here by the 
	isolation tank, suddenly "became" a chimp, jumping up 
	and down and hollering for twenty-five minutes. 
	Watching him, I was frightened. I asked him later, 
	"Where the hell were you?" He said, "I became a 
	pre-hominid, and I was in a tree. A leopard was trying 
	to get me. So I was trying to scare him away." 

	The manuscript of The Scientist (1978 ISBN 0397012748, 
	updated in 1988 and reissued in 1996, ISBN 0914171720) 
	was in the hands of Bantam, the publishers.
	The head of Bantam called and said, "Paddy Chayefsky 
	would like to read your manuscript. Will you give him 
	your permission? I said, "Only if he calls me and asks
	permission." He didn't call. 
	But he probably read the manuscript. 

The film was directed by Ken Russell, after Arthur Penn resigned 
in a dispute with Chayefsky. It starred Blair Brown and William Hurt 
in his screen debut. It was also the film debut of Drew Barrymore. 

Altered States is also a novel by Anita Brookner.
http://en2.wikipedia.org/wiki/Altered_States 

Author Paddy Chayefsky disowned this movie. 
   "truth is what's transient, it's human 
   life  that is real..." -- Dr. Jessup
http://fusionanomaly.net/alteredstates.html