I completed my two-week 7 mg nicotine regimen two days ago. I had no side effects other than minor constipation and some sleep disturbance – no improvement in energy or strength during the two weeks. Since the last patch, I have noticed an improvement – not during the two weeks, but over the past two days. It has been mostly in the form of my ability to keep going, exercise, and sleep a bit better. My wife has noticed the improvement – calls it encouraging. I will keep you posted with what time brings. cm/Asheville, NC