or skin reaction to it. if you develop these stop taking chantix and see your doctor right away as some can be life-threatening. tell your doctor if you have a history of heart or blood vessel problems, or if you develop new or worse symptoms. get medical help right away if you have symptoms of a heart attack or stroke. use caution when driving or operating machinery. common side effects include nausea, trouble sleeping and unusual dreams. with chantix and with the support system it worked for me. [ male announcer ] ask your doctor if chantix is right for you. ♪ [ male announcer ] every car we build must make adrenaline pump and pulses quicken. ♪ to help you not just to stay alive... but feel alive. the c-class is no exception. it's a mercedes-benz, through and through. see your authorized mercedes-benz dealer for exceptional offers through mercedes-benz financial services. [ whirring ] [ dog barks ]