Just as everyone else has said, my addicted ex-friend would do everything mentioned. She would Nod off in the car constantly, go out in public in pajamas, not shower, itch constantly, have an oversion to light, Sleep all day. The list goes on and on. She would shoot up on her arm, then try to cover it up with a hair scrunchy. Now who wears a hair scrunchy on their arm at the elbow???
It would take me calling 8-10 times sometimes more to wake her up. Her voice would get raspy and her speech would slow, slur and be very hard to understand, her stomach would hurt. And she would lied about everything and I mean everything. Never noticed the pin point pupils myself though. But the fact is believe what your seeing and not what they tell you.