psychedelic rock songs sometimes have lyrics describing the effects of drugs, if any words at all. songs were sometimes very long (10-15 minutes), and much of this time might be taken up by a solo, like a drum solo or a guitar solo. some major groups that made psychedelic rock included: the beatles, the doors, the byrds, the grateful dead, the who, jimi hendrix, jefferson airplane, pink floyd, frank zappa and the animals.