If you are taking
Coreg, which is a BP medication, there is a very good chance it is causing you to gain weight, it is a side effect that is common. It slows down the heart rate, the body isn't working as hard, the weight comes on. Other beta blockers do that as well. Like you, I had a healthy lifestyle with exercise, diet, etc but I put on a quick fifteen pounds when I started taking Coreg. However, I adjusted my exercise, diet, etc like mammo advised and the weight came off quickly.