birth control
"My wife was on continuous patches and she has breakthrough bleeding 365 days a year, nausea, throwing up, headaches, lower sex drive and extreme pain in her stomach which had her wake up in her sleep and crying out in pain especially during her period when not doing the 4th week.  The doctors didn't know what it was so they gave her an unconfirmed diagnosis because they couldn't confirm anything else but she's decided to discontinue the patch and so far all of the above side effects have subsided almost completely.  "