Return to Smoking & Vaping Sleepiness Chest Tightness Cold Symptoms Cravings Dizziness Gas Hunger Irritability Lack of Focus Low Energy Sleepiness Ways to Cope Why you’re feeling itNicotine has affected your brain waves and sleep patterns. Your brain is adjusting to new sleep patterns. How long it lasts1 week What you can doAvoid caffeine (coffee, cola).
