Related Clues:

• Psychedelic drug
• Metric amount, for short
• '60s tripper's substance
• A hallucinogen
• Leary's drug
• Prefix meaning ''thousand''
• Metric weight, briefly
• 1960s hallucinogen
• Cause of a hippie high
• "Dropped" substance
• Leary's turn-on
• Blotter paper substance
• '60s trip starter, initially
• Narc's discovery, maybe
• It'll change your mind