I took 8 crushed 20 mg methylphenidate pills. So that is 160mg. I'm 17, female, 5 foot and 3 inches tall, and 260 pounds. I am shaking, jittery, my heart rate is 180, my breathing has increased, and my temperature is 99.1. These pills are precribed to me for ADHD. I am well aware that i shouldn't have taken 4 times the amount, it was very dumb. I need recommendations on what I should do, or rensurence on if I'm going to be okay.