MedlinePlus Medical Encyclopedia: Signs of drug abuse

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Signs of drug abuse

Blood shot eyes can be a sign of drug abuse. The blood vessels on the surface of the eye dilate in response to the use of certain drugs, making the eyes appear red.

Update Date: 11/18/2005

Updated by: John Goldenring, MD, MPH, Department of Pediatrics, Children's Hospital, San Diego, CA. Review provided by VeriMed Healthcare Network.

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