Cocaine - This mixture could improve strain on the center to harmful, probably fatal ranges. MDMA - The neurotoxic effects of MDMA may be elevated when combined with amphetamine and other stimulants. Pentorex , also referred to as phenpentermine or α,β-dimethylamphetamine, is a stimulant drug associated to phentermine which is used as an anorectic to assist with weight reduction. Combinations