same thing happened to my friend angie when she was young. Her friend nadine had ritalin(I think it was ritalin) for her "adhd"(the friend used em to get high too so i dont think it was really adhd)and told her that they were like sugar pills and would make her hyper. She gave her TEN OF THEM

She ended up in the hospital having to drink charcoal, hallucinating, having a really miserable time. The doctors said she easily could have died had she only had a couple more.

Scary stuff.