You should definitely talk to your dr. Before taking any (even otc) kind of appetite suppressant, but be prepared for them to say no. Here's why. Almost every suppressant is a stimulant. If you already binge eat, this alone is putting a strain on your heart. The added strain of a stimulant could be dangerous. Its much safer - and will have much better long term results - if you work with your dr/therapist/whomever is a part of your care to change your behaviors and learn new ways to cope with urges.
I really do know that this is much much much easier said than done. its a lot of hard work, but just keep your belief in yourself. You can do it. Small progresses that will add up to a lot.