http://www.medications.com/effect/view/29412 I'm in my 4th pack of Necon 1/35. The only side effect I've been having is spotting during the 3rd week of pills. This same spotting issue has been happeneng since I got on the pill 2 1/2 years ago. First I was on Alesse, then Loestrin 24 fe, and now Necon