Success without excercize ????

I hate to exercise, I did lose 30lbs last year taking phentermine diet pills and B12 shots under the supervision of my doctor, not sure how safe that is but I had energy and was successful, I went through depression after learning that my dear doctor had passed from a heart attack, gained 15lbs back, but will try again and see how it goes, this time on my own and I will add exercise, I did follow a fat free eating habit as well.