I looked up Byetta, that's a 2x / day version of the glucagon suppressor drug that I used before, Victoza (which is 1 injection per day). I can confirm first hand after taking it for six months that my blood sugars did dramatically improve, and I also lost 20 pounds, but eventually the nausea and constant low-grade headaches made me quit. I was considering going back on it earlier this year when I read yet another study with type 1s using victoza, that it helped in 3 / 5 main type 1-specific effects.
Those studies showed that going to 1.8 mg / day of victoza didn't benefit more than 1.2, so the sweet spot to aim for is 1.2. Usually you start at 0.6 then up it in 0.6 increments until you reach max 1.8, but if I do go back on it (which now I'm thinking of doing), I'll probably start at 0.6 and keep that for a long while, and increase in 0.1 increments up to 1.2 / day max. The first night you take it, and the next day, expect to throw up violently. And barely eat. But when you stabilize you will find that you can sit through a meal at a restaurant and not get restless leg syndrome or irritable. I remember feeling and saying like I felt like a normal human being again, but after a while of taking it I just couldn't manage the nasty side effects. Maybe if I just keep these doses low I can get the benefits without making my life miserable. Don't get me wrong, reducing my insulin intake by 1/2 and losing a bunch of weight is great, but being lethargic and having headaches all the time is a tough thing to swallow. I don't think the headaches lasted too long at 0.6mg / day, so maybe finding a sweet spot like 0.9, increased gradually, could be the best solution...
I also read about a 1/week version of that gila monster hormone that I'd like to try. Ask your GP about it, if he knows, try that instead maybe. Who knows, maybe the headaches and nausea are lessened with the weekly injection instead of the daily one. But the studies for Victoza for type 1s is no joke, and no pie in the sky, seriously. It's worth trying regardless of the beta cell regeneration aspect of it. It just might be that 480 verapamil per day plus 1.2 victoza + lantus covering most of your daily insulin needs instead of the ups and downs of short-acting insulin could all work together in a synergistic effect to give our pancreases the right kind of stress-free stability it needs to get its engines running. I'm taking 8 ibuprofens per day to reduce inflammation which some type 1 cure studies are using. I tried the vitamin C supplement route too but I gave up a long time ago.
Looks like I'll be getting my liraglutide (victoza) script renewed from my main GP, who saw the graphs of my blood sugars and was totally on board me sticking to it. The results spoke for themselves. Now that you mention the beta cell regeneration aspect of it, I'm definitely leaning towards getting back on. Only thing is, how to avoid the headaches. So if you can find out if you can get the 1/week variant of that drug, that would be a good thing to try IMO. If not, try Victoza, but by all means, don't go above 1.2mg / day if you want to be productive. I had such a hard time concentrating at work with all those headaches, I was popping tylenols and advils like crazy. With 0.6 per day the headaches were much more manageagle and eventually subsided, though for a few hours per day you will feel like your head's in a vice and feel dizzy and nautious. I recommend ramping it up really slowly, that's what I'm gonna do. Who knows, maybe Byetta gives less headaches than Victoza. Something to compare. But I'm at a point right now in my life with so much stuff on my plate that I can't really lose productivity through lethargy and general zombie-like that that comes with Victoza. For a few hours per day at least, I remember feeling pretty awful. Thing is, I kept to it for six months because the benefits outweighed the negatives. The rest of the day, when the side effects has subsided, I felt like I felt before being diabetic. Like I could sit down and be calm and have a meal or just live without being anxious or irritable.