Can You Get Withdrawal Symptoms When You Stop Drinking Diet Coke?

Can You Get Withdrawal Symptoms When You Stop Drinking Diet Coke? Withdrawal symptoms include irritability, fatigue, headaches, and even feelings of depression ( 21 , 22 ). Usually, these withdrawal symptoms are due to quitting caffeine, and they typically last anywhere from 2–9 days ( 21 ). What happens if you stop drinking diet soda?