People who quit smoking withdraw from nicotine for approximately one week, but symptoms can last a few weeks, explains the U.S. Department of Health and Human Services. Many smokers experience cravings related to triggers such as certain times of the day when they used to smoke.
Symptoms of nicotine withdrawal vary but commonly include restless and jumpy feelings, agitation or irritability, a slower heart rate, food cravings, or trouble sleeping, according to the U.S. Department of Health and Human Services. Some smokers feel sad, grouchy or on edge when coping with nicotine withdrawals. Behavioral changes and medication can help to reduce the effects of nicotine withdrawal.