Back in the 2000's I picked up a bunch of Test Prop ampules from a source that was blowing them out for a very good price. Well didn't take long to find out why they were priced so good. Well there was definitely way to much BA or whatever solvent being used in this batch. Within 24hrs the muscle swelled and become very red and lasted roughly 5 days or so. Hurt like hell and just had to suffer through the pain for days. Gave it awhile till the memory of the pain subsided, a few months or so and gave it another try by cutting it with cottonseed oil, same thing. Another lengthy period of staying away from this junk and cut it more this time using as little as possible, I'll be damned, it was just as bad as the first time. In the trash all those ampules went. The source definitely priced it to off load which really pissed me off that they were trying to get some money back out of some really bunk gear. Haven't had that experience since. Either I'm using the right sponsors now a days or the UG labs have their shit together but I haven't had PIP in years now. Back in those days I really tried to stick to mainly pharm grade but now I'm trusting of some hand picked UG labs.