TweetEverything I've read says you should try to keep DNP use under 10 days at a time. Pretty extreme stuff, improper use has taken quite a few lives and many of those were professionals who knew what they were doing. That said, if you follow the instructions closely on the few sites that tell exactly how to take, supplement, and recover. You can lose up to a lb of pure fat ed you're on it. Don't plan to do much else while your on it though and buy some cheap disposable sheets (I hear your sweat will stain them).
Be careful, Good Luck, and post your results here when your done!