.

Change in friends.

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Hanging out with a new group.

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Reclusive behavior - long periods spent in self imposed isolation.

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Long, unexplained absences

.

Lying and stealing.

.

Involvement on the wrong side of the law.

.

Deteriorating family relationships.

.

Obvious intoxication, delirious, incoherent or unconscious.

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Changes in behavior and attitude.

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Decrease in school performance

.

Has their appearance changed; they don't care how they look?

.

Are they eating properly?

.

Have they lost weight, or have they gained weight?

.

Have you seen needle marks on their arms or legs?

.

Are they slowing down?

.

Do they have the shakes?

.

Are their hands cold and sweaty?

.

Have you smelled something on their breath, or their clothing?

.

Do their eyes appear red?

.

Are their pupils dilated?

.

Do they have sores on their skin? Is their face puffy?

.

Has their coloring changed, become flushed or pale?

.

Do they have a blank stare?

.

Has their physical coordination changed? Are they staggering?

.

Have they missed a lot of school, or work?

.

Have their sleep habits changed? Are they always tired?

.

Have they become lazy?

.

Are they hyper?

.

Do they talk a million miles an hour? Do they slur their words?

.

Have you seen drug paraphernalia?