Nicotine’s new appeal

Mimicking the addictive compound’s action in the brain could lead to new drugs for Alzheimer’s, Parkinson’s and schizophrenia

First, let’s clear the air: Nicotine invites addiction, and it employs a delivery device that’s been killing people for centuries. But let’s also be honest: Nicotine has some attractive qualities. Smokers use it to calm jitters or perk themselves up.