<s>[INST] hello doctor, good day! i would just like to have an advise. i had sex last night around 8pm. the condom was defective and i am very worried cause i am fertile this time. just wanna sure not to get pregnant. last month i took althea but i stopped cause i missed taking it. then now i found on the net that nordette s commonly used here in my country as a morning after pill.. 11;06am i took 4 white tablets (pfizer) then hopefully aftr 12 hours ill be taking another four tablets.. just want to ask if would that make any problem if  i had taken althea last month then i switched to nordette? cause iim planning to have althea again on the first day of my next menstruation. would nordette help me not to get pregnant even though i used althea last month? please help me.. thanks.. [/INST] Hi, Thanks for the query. Possibly Corvette will give protection as you are taking that within recommended time in sufficient dose. It may alter your menstrual cycle, as you are taking the high dose. Then after getting with Chat Doctor. Usually these may not affect the action of each other as there is sufficient gap in between the usage of two. But better to avoid high dose pills using for emergency purpose and stick-on to regular pills. For more details you can ask me through: http://www.ChatDoctor .com/doctors/ </s>