Has anyone used Mylan; generic for levothyroxine? Is it comparable? I have numerous friends that work at Amgen Pharmaceuticals that swear on their lives that Generic brands are simply not the same as non generic due to the processing of the labs. I think this is true with vitamins, but I have no scientific research that proves this with pharmaceuticals. I trust my friends opinions, however. I just don't want to waste my time taking a generic if it's not going to have the same effect as a non generic. Any experience with this?