Some parents feel like they have to sleep with both eyes open when their children are growing up.
Adolescence is a natural period of experimentation. If you notice any of these symptoms, don't preach, lecture, or lash out. Instead, discuss the substance use calmly and frankly. Why Smoking Marijuana Is a Mistake Marijuana is the most commonly used illicit drug around. It's a mild hallucinogen that may also produce euphoria, apathy, poor coordination, reddened eyes, increased appetite, increased heart rate, panic attacks, and short-term memory loss.