Hello, I was not able to get my perscription of Ritalin on time, I took my last one yesterday. I dont want to go through any kind of withdrawl because I wont be able to get to my doctors for 3 more days. My son takes Adderall extended release (10 mg), I know they are similar. Is it safe for me to take an Aderall to at least have the similar chemical? My actual daily dose for Ritalin is 20mg 3 times a day! So I pretty sure I will feel some kind of awful withdrawl soon! Please answer if you know!!! Thanks!