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How to recognize the signs of intoxication
Look for glassy or bloodshot eyes.
A person's eyes can tell you a lot about him and his mental state in a particular moment. If his eyes are glassy and bloodshot, it could be a sign that he's been drinking too much.
Additionally, if a person has droopy eyes and he is clearly having trouble keeping his eyes open, this could also be a sign of intoxication. Note: bloodshot eyes could also be a sign of allergies or another medical condition.