My first time injecting Melanotan II, I also experienced the beet-red face and flushing feeling accompanied with slight nausea. I pushed 2iu subcutaneously in the umbilicus region. It felt just like a niacin flush but it came on almost instantaneously.* I wondered at the time if the supplier was just giving me a bottle of niacin powder. But subsequent injections have not had that initial response. Maybe a slight warmth feeling in my face but nothing else. But after only 4 days (and a daily trip to the tanning parlor) I am very tan! Also, the morning wood is rather amazing...