I know how you are feeling. I have experienced both sides, I’m a former addict (opiates) and I know work with people who suffer with addiction. Make sure you catch him off guard with the test to ensure he can’t sabotage the test, you’d be surprised the lengths people go to try and get away with it by either using someone else’s (I’ve even tested someone and it turned out to be apple juice!) so we now have to supervise them.
I’m sure you know all the things to look out for but dilated pupils, running nose, weight loss, mood swings, trouble sleeping, hyperactive and rambling just to name a few. It’s a horrible horrible drug.
And most importantly reinforce your doing this because you care about him and how dangerous it is, he could overdose and the people who are supplying it to him are NOT his friends, they’re just after the money and cocaine is a very expensive drug and most of the time its mixed with all sorts to bulk up their supply.
Here if you ever need to chat, Erin.