In 1999, I weighed 196 pounds. I'm 5' 10". That was 10 pounds over my max weight allowed under the height/weight requirements. I did PT everyday and ran every other day at least 3 miles. But I couldn't get under 190 or so. A friend turned me onto Ripped Fuel, which at the time still contained ephedrine. In 3 months of running, weight training, cardio (my normal routine) plus using the Ripped Fuel, I dropped down to 164 pounds. I'd not seen that weight since 9th grade. So that was the good side of it.
The bad side of it: I completely lost my appetite for the first week. I don't think I ate anything, at all, for the first 3 days. My heart rate was off the charts and I was always jittery. I experienced dizzy spells a lot. Plus some other side effects. After about another month of using them, I quit. After about 2 weeks without them, I had pretty much normalized again and my weight, while still doing all the same PT, had come up to about 175. Which was acceptable to me.
Would I use pills again? No. I know what I felt like and wouldn't want that again. Not to mention the stuff we now know about ephedrine. I currently have a bit of a middle, but I'm working on it at the Y running and doing laps in the pool plus weights. My knees and my back aren't the greatest, due to my time in service and all the shit I did but I'm getting there.
Speak with your doctor. Tell him what you want to do. Get a physical and you should be able to come to some type of excercise plan that works for you.