Two weeks ago, I did a trial run with the patch. I went 3 1/2 hours and had heart flutters like crazy. The patch was 14 mg and the brand was sun mark. I removed the patch and a few hours later the heart flutters stopped. Today I did another patch trial run...this time 7 mg and the brand was Nicoderm CQ. After 6 hours I got slight heart flutters but not bad but the worst was horrible achy pain in right leg...I had placed the patch on my right hip. Five or ten mns after removing the patch, the pain ceased. Dagnabit! Otherwise, the patch was working, helping me!