Man, I'm running Sustaxyl 350. Finished the first bottle with no problems, hardly any post injection pain and zero sign of irritation at injection site. Started the second bottle last week (same lot number) and as soon as I inject, the pain is unbelievable and I get swelling in the shape of a raised 4-5 inch circle. YOWWW!!! Kalpa sust 350. I don't know if I'm in danger or if this happens to others. I don't know what to do.