I have to say something about exercise; it's great, it's healthy, many benefits.
Weight loss is not among them.
Unless you do something really hardcore like 100 mile bike rides or 5 mile swims, exercise only burns a few extra calories; counter-intuitive I know, because it feels like you're doing great.
We get fat by overeating; anyone who is seriously overweight has an appetite problem, similar to addiction.
Chemicals released by exercise make you hungry, exacerbating the real problem.
All those fitness freaks telling people with weight problems that exercise is the answer, are simply wrong. And probably have something to sell.
My OH has been using Ozemic in pill form for over a year, with really good results. She takes it once a week in pill form, and about 20% of the recommended dose.
Due to illness, she can't exercise. She lost 25 lbs over 6 months.
We buy 14mg pills and break them in 1/4s at first, now 1/2. They sell the higher dose at the same price as lower dose, and tell you not to break the pills. That's BS.
Her appetite does come back when she doesn't take the pill for a few weeks. This medication has been around for a while, as a diabetes treatment; there has been little serious adverse effects.
It could be that a person with a serious overeating disorder will need to take it indefinitely; but you can certainly taper right back to a small dose once you get your weight down to a healthy level.
As for the Atkins, low carb, whatever diet; my Dad was a true believer for decades. He was always morbidly obese and died young of heart attack.
My older brother was also morbidly obese as a teenager, absolutely terrifyingly huge; he got himself thin by sheer will power and stayed that way until today. He's 66 and rides bicycle 400 miles a week (which will, as stated above, actually burn some serious calories).
I am a food addict. I love to eat, everything, all the time. I've struggled with it my whole life. I can abstain for a time (Eve a 20 day fast), but moderation is really tough. At this time, I'm 180 lbs at 5'8", which is ok.
Fat will kill you; these new drugs will not. Exercise is great, I recommend it.
But if you need to lose weight, and you're over 50, and you didn't succeed before, just take the drug. It can save your life.