What are the effects on the brain from hashish could anybody tell me? From the stage that one is stoned to the stage that the stoned feeling has decayed. And are there any long term effects from this substance? Does it really kill off brain cells for good? And why do you become so creative under the influence? I have smoked this substance & when im reading my physics books or astronomy books under the influence it becomes amazing what you can imagine in your head! I wish I was always like that.