Cyclopropylmescaline (CPM or 4-cyclopropylmethoxy-3,5-dimethoxyphenethylamine) is a lesser-known psychedelic drug. CPM was first synthesized by Alexander Shulgin. In his book PiHKAL, the dosage range is listed as 60–80 mg and the duration listed as 12–18 hours.[1] CPM produces closed-eye imagery, visuals, and fantasies. It also causes enhancement of music.[1] Very little data exists about the pharmacological properties, metabolism, and toxicity of CPM.