These are guidelines.
Do not ignore signs, but do not assume drug use based on one criterion. 
• 	Drop in school attendance or academic performance
• 	Change in friends
• 	Lack of interest in personal appearance
• 	Tardiness or skipping class
• 	Frequent absences
• 	Frequent behavior problems
• 	Uncharacteristic withdrawal form family, friends and interests
• 	Unaccounted for cash
• 	History of arrest or crime in community
• 	Unusual or persistent hostility and lack of cooperativeness
• 	Physical changes (persistent runny nose, red eyes, coughing, wheezing, bruises, needle marks)
• 	Socializes with drug users
• 	Odor from drugs