For the lucky few, minimal side effects. But for the rest of us:
Days 1 to 2 of quitting is when withdrawal symptoms start. A meta-analyses of over 23,000 people found that 47% had at least three of the following withdrawal symptoms: nausea, headaches, depressed mood, difficulty getting to sleep, sweating, anger, nervousness, decreased appetite, and strange dreams.
The risk of withdrawal symptoms is proportional to the amount of marijuana you’ve been consuming. For example, someone who consumed marijuana three times a week would likely have less withdrawal symptoms than someone who consumed marijuana every day.
Day 3 of quitting is an irritability and anxiety peak for most people. Thankfully, they begin to dissipate in the coming days. On the other hand, strange dreams and difficulty getting to sleep only begin to increase on day 3.
Day 4 of quitting is when the amazing physiological changes in your brain start to occur. It only takes around four days of quitting marijuana for the neuronal changes in your brain to start to go back to baseline.
Days 5 to 7 of quitting marijuana is the period of time when most people who have tried to quit and failed are likely to fail at quitting. Since days 5 to 7 are statistically the biggest hurdles for people attempting to quit smoking weed, these are days someone should pay particular focus on getting past.
Days 8 to 28. Slow and steady, a little better, every day.