I'm prescribed to vyvanse and take 50 mg every morning. I don't abuse it, just take what I'm prescribed to. Anyways, meeting up with some old high school buddies this weekend and going to be doing some coke on Friday night. I'm worried that taking my vyvanse friday morning will severely affect the effectiveness of the coke and couldn't really seem to find a clear answer on bluelight or anywhere else. Anybody have advice from similar experiences. I really don't want to skip my vyvanse friday but I will if it's going to affect the coke later on that night?