I'm sorry I just wanted to clarify my post below. I'm not an employee of Merck and I'm not promoting Singular. I just wanted to make a post about the fact that not everyone suffers from the severe side effects of drugs. And for those that are on Singular and have NO side effects that you are not alone and if you are fine and comfortable with it then don't worry about it. If you want, contact your doctor and discuss this with them to ease your mind.