I just saw this and as far as the flu symptom, they can be confused for ketosis.. if the guy who had those symptoms didnt get it worked out take a look at diet, check ketones if this is any possibility sand check hydration and electrolytes..
If you are unaware you might be surprised how possible this is.. im not saying like full blown mega keto diet ketoisis, but if ketones, which happen when burning fat, which will happen when u bump up your metabo etc when you start taking things like dbol etc.. I dontthink ive ever heard of TEst flu personally