Complex sentence: Benzedrex inhalers are sometimes used to obtain the propylhexedrine freebase in the cotton rods they contain as the propylhexedrine is sometimes used as a recreational drug, as the effects are sometimes likened by some users to amphetamine and other stimulant drugs.
Split into simpler sentences: Benzedrex inhalers are sometimes used to obtain the propylhexedrine freebase in the cotton rods they contain, as the propylhexedrine is sometimes used as a recreational drug. The effects are sometimes likened by some users to amphetamine and other stimulant drugs.