It happened to me about 3 weeks ago on Test cyp250. 1 cc 2x a week ,on week 15!New bottle ,alcohol galore including hands because I'm a paranoid fuck !The first 2 shots were great no pip at all !Afterwards ,the 3rd gave me shit pip about 5 days ,I thought I would give it another try !Shot 4 was even worse !this time lasted more than a week !I ended up tossing it out and switched to Test e!I pinned quads and delts as usual ,so far everything is great !