In his book PiHKAL, the minimum dosage is listed as 200 mg, and the duration unknown. MDPR is a promoter; by itself it has almost no effects on the mind, but it promotes the effects of hallucinogens, similarly to the closely related MDPH.
In his book PiHKAL, the minimum dosage is stated as 200 mg, and the duration is unspecified. MDPR acts as a promoter; on its own, it has minimal effects on the mind but enhances the impact of hallucinogens, similar to MDPH.