A bit late to this thread, just rejoined the forum recently after over a decade away from it.

I've been flying with diabetes since 2004 . 6 months ago my pancreas waived the white flag and I finally had to go on meds I can't fly with. I've been there, done that so can answer questions anyone has about flying with diabetes. I've worked with AMAS (Aviation Medical Advisory Service) quite a bit too.

As of about 4 months ago the FAA is not giving Class 1 medicals to insulin dependent diabetics. This is info from AMAS. The FAA is under a lot of pressure to change this, but nothing has happened. Senator McCain is trying to get an Arizona Pilot approved but even he hasn't been able to get a decision out of the medical bureaucrats at the FAA.

A study done by the American Diabetic Assoc in 2015 recommended approval, with a long list of restrictions. But again, no action so far.
Canada has had insulin dependent diabetic pilots flying airliners since the 1990's due to their version of the Americans with Disabilities Act.

With waivers you can be on up to 4 different diabetic meds and still get a Class 1. There's an allowable med combo chart on the FAA website. Over the years I have been or still am on meds like Metformin, Januvia, Actos, Victoza, Trulicity, and even Glipizide which was just approved in late 2015. The latter is very powerful and knocked my sugar levels almost below the diabetic threshold. But it has a side effect of weight gain in some people, and I was one of those. Sugar levels went back up and I had to start taking non-allowed meds since there was nothing left on the approved list that I hadn't been on already. After getting off the Glipizide I dropped 25lbs in just 2 months. Then I lost another 6lbs over the next few months but my sugar levels actually went up 10%, that's how my Doctor knew my pancreas was flamed out

Again, I'll do my best to answer any questions since unfortunately I've become a bit of an expert on this.

AirBear