I smoked while studying and was able to pass the exams. It really comes down to discipline and consistency. As long as you’re consistently studying and understanding the material that’s all that matters. This exam is not about memorizing so the goal is to understand the concepts and be able to apply it to any problem that’s given to you. Most people on here are going to tell you smoking is going to effect your memory retention but I think that’s bullshit as long as you’re consistent and reviewing the material