Alexander admits to using the unnamed energy drink but was not in knowledge, that it contained any unapproved additives. He also takes responsibility in the fact, he was the one who drank it without confirming its ingredients. I believe this suspension will be overturned, quickly.
“The Tampa Bay Buccaneers received notice that rookie linebacker Kwon Alexander has been suspended four games for violating the NFL’s policy on performance-enhancing drugs. The Tampa Bay Times reported Thursday that the suspension is subject to appeal, and Alexander has five days to file the paperwork challenging the outcome.” – Reported by The Sports Xchange
More on this here: Buccaneers receive notice of LB Kwon Alexander’s suspension