I really dont want to be the guy who sounds like an asshole............BUT why would you even question this? Are 4 weeks of flu like symptoms worth continuing the use? I personally dont like A50, I get the same results and an unbelievable feeling from running dbol. I would stop if I were you. Also do some research, search for a50 that fits the description of the pills you have because there is a lot of stuff out there that isnt real. Have to be careful bro!