Q.  What Are The Most Commonly Abused Drugs?

A.  The Picture Below Illustrates The Most Commonly Abused Drugs.

Source (DEA)

Q.  What Are The Most Common Signs Of Addiction?

A.  The following are a few signs for someone who needs treatment:

  • Increase or decrease in appetite

  • changes in eating habits

  • unexplained weight loss or gain

  • Smell of substance on breath, body or clothes

  • Extreme hyperactivity

  • Excessive talkativeness

  • Needle marks or bruises on lower arm, legs or bottom of feet

  • Change in overall attitude / personality with no other identifiable cause

  • Changes in friends: new hang-outs, avoidance of old crowd, new friends are drug users

  • Change in activities; loss of interest in things that were important before

  • Drop in school or work performance; skips or is late to school or work

  • Changes in habits at home; loss of interest in family and family activities

  • Difficulty in paying attention; forgetfulness

  • Lack of motivation, energy, self-esteem, discipline. Bored, "I don't care" attitude

  • Defensiveness, temper tantrums, resentful behavior (everything's a hassle)

  • Unexplained moodiness, irritability, or nervousness

  • Violent temper or bizarre behavior

  • Unexplained silliness or giddiness

  • Paranoia -- suspiciousness

  • Excessive need for privacy; keeps door locked or closed, won't let people in

  • Secretive or suspicious behavior

  • Car accidents, fender benders, household accidents

  • Chronic dishonesty; trouble with police

  • Unexplained need for money; can't explain where money goes; stealing

  • Unusual effort to cover arms, legs. Change in personal grooming habits

  • Possession of drug paraphernalia

  • The above are the main signs of addiction but not the only ones. Those signs are a guideline