bellavita - The cancer risk with biologics is based on some original studies when the drug first came out. There are warnings that a very rare form of cancer might be more likely with biologics but still very rare. The link Ides provided above is studying the cancer risk on actual patients taking these drugs. So far, the cancer risk is not worse for the actual patient population.
mtgman - Humira told you to just throw them away?? Have you tried to return the containers through their online system? https://www.humira.com/myhumira/pen-syringe-disposal.aspx