User blog comment:IamJakuhoRaikoben/Chapter 473: Red Lightning, Review./@comment-1248963-20160217091753/@comment-5303512-20160217142314

Well, when actual think about it, when the MBP was first introduced, it seemed like almost everyone was heavily effected by them it seemed that Freed was able to somehow still move and be conscious even when he was infected by the same amount as his other fellow Thunder God Tribe members, Yajima and Laxus who had it worse, he was able to carry all three of them and still stay conscious long for him to talk to Makarov. So it looks like with the same property but different function, Freed had a certain tolerance of it at that time.