<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have been taking marvelon for years, my last 5 packs were run back to back and changed to Cerazette. 4 days into my current pill pack. I had a 6 day period a couple of days after Stating cerazette when should I be protectes Against pregnancy? Thanksa6  <response>: HiS tart the new brand on active hormone pills and skip the pill-free interval i.e. follow active tablets of the former brand with active tablets of the new brand without a pill-free interval. Following this advice means that the woman will miss a with Chat Doctor. Another option is to apply the 7-day rule and use alternative methods of contraception, such as condoms and a spermicide which should be prescribed during the consultation, until such time as 7 active hormone tablets have been taken from the new pack. Hope I have answered your query. Let me know if I can assist you further. Regards 