Related Clues:

• It's dropped for a trip
• Subject of some overreaching 1960s anti-drug propaganda movies
• Tripper's drug
• Mind-expander of a sort
• "Lucy in the Sky With Diamonds" subject, supposedly
• Acid that many dropped
• Drug on blotter paper
• You'll trip if you drop it
• Much-discussed initials of a 1967 Beatles song
• Something dropped before tripping?
• It's usually tripped on deliberately
• Subj. in 'The Electric Kool-Aid Acid Test'
• Flashback drug
• It made Leary bleary?
• One way to change your mind?