Exubera stayed on the market for about a year. It was a financial flop, but worked fine as a short acting insulin. Another inhalable insulin in development has been called off just now. Currently, multiple research studies are ongoing working on brining oral insulins to market.
Many in the blogospher and elsewhere scoffed when Exubera hit the market. They said that shots don't hurt that much, that a bong is too conspicuous, and that Exubera added nothing new. I admit it, I didn't run out and buy Exubera either. But I was excited. I was pretty sad about Exubera leaving the market. Why? Because shots do hurt. Certainly, the insulin shots don't hurt much compared to some of the other injections I take. But I've got bruises right now on my stomache, my breasts (I inject 'em), my legs, and my ass. I don't think I've got any on my arms at the moment, but that will probably change in less than a week. I get a new injection bruise almost every day. The I-Port red marks each lasted over a month.
That we lost the option of switching away from bruises- well, that stings.