Why did you highlighted the line about tolerance? Tolerance means temporal insensitivity to a drug.
You've omitted withdrawal symptoms, winch are nothing like those usually described when talking about "maidan drugs" (amph barely causes physical addiction, only after long period of abuse).
Sample of tea or food or whatever, or, if doctors diagnosed "drug addiction", there should be traces in blood. There's no generic "drug addiction" and "withdrawal" diagnosis.