I switched from Yasmin to Cryselle (a generic for Lo-Ovral), and I have had no problems with it! It is absolutely my favorite pill I have been on. No BTB, no weight gain, and my period comes at exactly the same time each week. This was not so with Yasmin. I have had more side effects from the brand names I have been on, than from this generic (and I have been on 7 different pills, this is the first generic.) Good luck!