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Self-reported ratings of the subjective effects “drug strength”, “good effects”, “bad effects”, “drug liking”, and “would take drug again” on a questionnaire administered at the end of the experimental session. All values are mean ± SEM. Symbols represent significant differences from placebo (p< 0.05), where † represents differences in Good Effects, ‡ is Bad Effects, and ¥ is Drug Liking. Range of ratings was from 0 to 100; scales have been shortened for illustrative clarity.
