The doctor explained to me that the reason I was having symptoms with the regular dose pills was because they were created for an average sized woman of like 140 pounds.... At 110 pounds (I think I may have even been around 100 at the time), I was being overdosed on hormones, and my body was reacting. Of course, everyone is different. It makes you wonder though how low dose hormone pills are effective for larger women. Maybe they aren't recommended. I don't know. As a nurse, I've never heard that restriction though.