I think it does. There are some that I think are real, like antibiotics have always upset my stomach, but I find that when I read the side-effects I end up with a whole bunch of them, especially things like dizziness, palpitations...heart attacks are my biggest fear so if anything says I might experience chest pain I get it. Its given me a huge fear of taking medications, so now I don't let myself read the side effects. Then, after taking it, if I think I'm having a side effect, I tell my husband and HE looks up the side effects to see if it's one. This way I'm not looking for them.