Substance use disorder occurs when a person needs alcohol or another substance (drug) to function normally. Abruptly stopping the substance leads to withdrawal symptoms. Addiction means that a person has a strong urge to use the substance and cannot stop, even if they want to.
So it is important to maintain positive nitrogen balance in the body while sleeping. When you do and conditions are right so that your rate of protein synthesis exceeds your rate of degradation, and you maintain a positive nitrogen balance, you can grow while you sleep.
Keep in mind that it takes approximately 15 minutes to fall asleep when scheduling your sleep. How Much Sleep do you need? Rest and renewal only comes during the REM stages, the more rest you need translates in to needing more time spent in the REM stages of sleep.