 In his book "PiHKAL", he lists the active dose range as 20–50 mg, and the duration as 10–14 hours.According to Shulgin, MEM produces color enhancement, visual phenomena, and pattern movement, among other effects.MEM possesses affinity (Ki) for the 5-HT2A (3,948 nM), 5-HT2B (64.5 nM), 5-HT7 (7,156 nM), and σ1 (5,077 nM) receptors.