I'm weening myself off a certain research chemical stimulant called 4-Fluoromethylphenidate. I was taking it therapeutically and it lasts for 8 hours but then I decided to take 100x more for euphoria. I then decided no matter how much I take, there's no difference anymore so I went to sleep. I stayed in bed sleeping as much as I could but the pain was unbearable so I decided to prepare a line where I said "Come on, you can do this... you can prepare this line" because I was so exhausted. 5-10 minutes later, I was more than normal. But this time it will only last 4 hours. The crash and withdrawal is unlike any other stimulant I've taken it's horrible.