Take LSD to resist narco interrogation better...


Since information obtained from a person in a psychotic drug state would be unrealistic, bizarre, and extremely difficult to assess, the self-administration of LSD-25, which is effective in minute dosages, might in special circumstances offer an operative temporary protection against interrogation. Conceivably, on the other hand, an adversary service could use such drugs to produce anxiety or terror in medically unsophisticated subjects unable to distinguish drug-induced psychosis from actual insanity. An enlightened operative could not be thus frightened, however, knowing that the effect of these hallucinogenic agents is transient in normal individuals

http://cryptome.com/0001/cia-truth.htm