[header] How to recognize the signs of intoxication [title] Look for glassy or bloodshot eyes. [step] 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. [substeps] Note: bloodshot eyes could also be a sign of allergies or another medical condition.