Cessation of nicotine use is followed by a withdrawal period that may last a month or more and includes symptoms that can quickly drive people back to using it. Nicotine withdrawal symptoms may begin within a few hours after use, and include:
• Irritability
• Sleep disturbances
• Craving
• Cognitive and attentional deficits
• Increased appetite
Symptoms generally peak within the first few days and may subside within a few weeks, though for some people, they may persist for months or longer.