After leaving Stanford, he became a clinical psychologist, and worked at the Veterans Administration hospital studying the causes of schizophrenia. He also worked with LSD at the Mental Research Institute in Palo Alto, under grants from the National Institute of Mental Health. This was during the time that NIHM was channelling funds for the CIA's MK-ULTRA LSD experiments, so it is safe to say that Adams was working, directly or indirectly, for the CIA, although I don't know if he was aware of it (most researchers weren't).
Adams himself took LSD as part of these studies, and suffered two psychotic episodes, the second of which earned him a stay in a mental hospital.
(Anderson, Walter Truett, The Upstart Spring, Addison-Wesley Publishing, 1983, pg 59-62)