It was the max dose that Eli Lilly used in their last round of trials before they introduced the pens to the marketplace. (At the moment, they are trialing higher doses, 20 and 25 mg a lot of people are saying, I think I've also heard 30 mg.)
At any rate, some number of our grey GLP community have needed or wanted to go higher, for effectiveness. Often the higher-than-15 mg a week dose is achieved by more frequently dosing, but there are the occasional people who actually take 30 mg a week, as
@brentm mentioned.
Ongoing data shows that a not-insignificant percentage of patients who successfully followed the Lilly protocol to the max of 15 mg stopped losing weight around the (I think?) 80-week mark. Bummer.
We users are all aware that different bodies respond differently to these GLP meds. All those stories out there about people who lost 100 pounds and never got above 5 mg!! lol. And just like those people who don't need more than 2.5 or 5 mg, Some people need lots more. (And Eli Lilly knows it, and is conducting the clinical trials so they can get the government OK to introduce the higher dosage protocols to the beyonnnd-lucrative marketplace.)
in my view, our grey market community is in effect one huge clinical trial. And because we have the freedom to dose at whatever mg and frequency works for us, we've also got the freedom to go above 15 mg. And for some of us, higher than the "max dose" continues to be safe and beneficial and effective
