I've never had a real addiction, like with a true chemical dependency like with nicotine or anything. I've had several dependencies on drugs I've fought through my life.
I've always had sinus congestion, I believe it runs in my family, and when I was little my mother started giving me Afrin as a daily thing. So from when I was about five years old until I was around twenty five, I always had Afrin with me. I used to carry a spray bottle in my purse and I'd use it like every four hours, and I'd go into a total panic if my bottle ran out or if I lost it or couldn't find it, etc. I'd have to keep a bottle next to my bed, because every few hours my nose would just seal up. Well I finally realized most of my problems were from rebound, and you know those bottles warn you not to use it for more than three days, because you become very dependent on it. So I took a two week vacation from work and I decided to just quit, and it was really difficult at first, but my body adjusted and now I'm not so bad. I still have congestion issues, but nothing like I used to have when I was on rebound, and I can clear myself up with sudafed now when I really need it (before nothing worked). I haven't touched Afrin for over ten years now, and I can't even use it if I'm really sick because I'll probably be hooked again.
I'm off coffee for about four years now, after I was reading how coffee doesn't really do anything for you except relieves your caffeine withdrawal symptoms, and how when you wake up and you feel you desperately need coffee, that's not normal but that's you suffering from withdrawal. I didn't like feeling that way, so I just stopped drinking it, and it took me about a month to totally get it all out of my system. My first two weeks were really hard, I spent a whole weekend in bed because I was so tired, but once I got clear my life got soooo much better. I wake up every morning feeling really awake, like I've already had my coffee, and I don't get headaches as bad as I used to. Now coffee makes me feel ill, sort of like how you describe you feel with your soda, and I can't drink it except decaffeinated. Maybe like once or twice a week I'll drink a cup of caffeinated earl grey tea when I need a little pick-me-up, and I do sort of get a bit of a high from it because my body isn't used to caffeine any more, and it's only a gentle amount.
I don't know if I'd call my wine drinking an addiction or a dependency, I just like to drink wine because I love the taste, but I have no difficulty going without it for times, like I've gone months before without drinking anything. I've decided not to drink until after my wedding, because I really need to lose about 20 pounds, and I haven't had anything since Thanksgiving. I even have a bottle in my house that's unopened I'm going to save for Christmas (oh I'll still drink on special occasions like Valentine's Day), but I don't feel any compulsion to open it, so I really believe I don't truly have a problem, it's just something I really enjoy but unfortunately causes me to gain weight (I envy people who can drink and put on pounds!)
I have great sympathy for anyone struggling with addictions.