The regular use of some illegal drugs may cause cognitive impairments. Two of these substances are "ecstasy" and "canabis". Recent research has focussed on attention and memory in a community-based sample of young adults derived from a large-scale epidemiological study. Subjects were sampled with varying degrees of lifetime drug use.
A dose-response relationship was found for poorer episodic memory function when ecstasy and cannabis were used. There was also a stronger tendency for attention to lapse with the higher use of these drugs.
PositiveTip: For maximum memory and alertness stay away from all illegal drugs.