Can I switch medicines?

I've been taking rigevidon tablets to control periods and for contraception. Can I switch to cilest within the same month? Basically my doctor prescribed rigevidon so I took that, she then prescribed me cilest that I was supposed to take a couple of weeks ago.. But I've been taking the rigevidon .. I've run out of that though :( can I now switch to cilest? Thanks

Raen2013-01-10T08:44:56Z

Take the new drug as if it's the new patch for the old drug. Basically wait until after the days that you're supposed to have a period, and then start on cilest.