There are so many different kinds of prescription medications being recalled today. Do you know anyone who has used or came in contact with the fentanyl patch? If so you need to contact a fentanyl lawyer to help assist you or a loved one who has experienced side effects of this medicine. Wondering what side effects the fentanyl patch cause, then let me tell you. According to Sherman & Salkow, P.C., the medication can cause overdoses which lead to comas and death. They are dealing with multiple lawsuits against the manufacturer of the fentanyl patch and have had a successful run so far.