This article was co-authored by Tiffany Douglass, MA . Tiffany Douglass is the Founder of Wellness Retreat Recovery Center, a JCAHO (Joint Commission on Accreditation of Healthcare Organizations) accredited drug and alcohol treatment program based in San Jose, California. She has over ten years of experience in substance abuse treatment and was appointed a Global Goodwill Ambassador in 2019 for her efforts in residential addiction treatment. Tiffany earned a BA in Psychology from Emory University in 2004 and an MA in Psychology with an emphasis on Organization Behavior and Program Evaluation from Claremont Graduate University in 2006. This article has been viewed 998,030 times.

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To tell if someone is high, look into their eyes to see if they’re red or watery, or if they move involuntarily, which are all signs of drug use. You should also smell the person to see if you pick up smoke or a sweet scent, which could be a sign they've been smoking drugs. When the person swallows or talks, check if they smack their lips, salivate a lot, or clench their teeth, as these are potential symptoms of being high. Additionally, listen to how they talk, since someone who is high may speak too quickly or have difficulty talking. If you see the person moving around, note if they appear slow or non-responsive to people around them, which suggests that they’ve taken drugs. Make sure to pay attention to intense emotions, since someone who is high may be euphoric, aggressive, or relaxed. For tips on how to spot the signs of habitual drug use, keep reading!