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.
If you go to bed at the same time each day, your body will quickly adapt and help you fall asleep at that time each and every night. This same thing happens if you wake up at the same time each day, as you body will adapt to become tired when 7-8 hours before it expects to wake up the next morning.