Possession ? Sure, let them pat him, look in his house, his clothes, whatever. I doubt they'll find much.

Intoxication, yeah, could be, especially if he admits having taken the drug willingly. But would it be worse than the sum that was stolen from him ?

Did they exactly explain all the side effects of the drugs before hand ? Like, say, alteration of judgement ?

If the drugs are legal AND you took them knowing that you could do huge mistakes afterwards, then maybe you deserve what you got charged with.

If not, maybe, just maybe, they have done things they shouldn't have. Also, forbidding your non-intoxicated friend to come and meet you was so they could manipulate you without him protecting you guys. It's 100% a trap you fell in, and there should be ways to make a judge (or better, a jury) recognize that.

This joke only works in Farenheit, really.

With Celsius, you might find them a bit too hot to your taste.
With Kelvin, you'll probably get any part you choose to use to touch ice-glued to the lady...