varenicline therapy withdrawal may possibly cause increased irritability, urge to smoke, depression and sleep disturbances in nearly 3% of people3?? ???? ????? ??????? ?? ??????? ???? ??????? ???????? ??? ???? ?????? ???? ?????? ???????? ????????? ??? ??????? ??? ?????? ???? ?????? ????? ??? ????????? ?????? ????? ?? ????? ????? ??? ???????? ?? ???