I just wanted to add to this discussion of stinging/burning, not AmoPure specific.
I've been using pharmacy compounded tirz for a few months and I experienced stinging/burning on 3 occasions, where I had to ice the area for about 1/2 an hour.
Here's the interesting part, I share the tirz vial. Other person has never experienced stinging/burning and we take the shot at the same time. Other person takes a higher dose than me. I did not experience the stinging/burning for the first few weeks, but maybe started happening at my 7th and 8th shot (stinging/burning was consecutive for 3 times after), and I haven't experienced it since.
Also, I took Ozempic prescription shot before starting tirz. I was only on it for 4 weeks. I developed a round welt at injection site using Ozempic pen at my 3rd shot.
Open question for all: Can stinging/burning symptom possibly be how we personally, our bodies, respond to GLP1s at some point?