Portia is a generic form of Nordette, which means it contains the same active ingredients in the same amounts but is likely to be cheaper. There are other generic birth control pills with the same formula including Seasonale, Jolessa, Quasense, Introvale, Chateal EQ, Marlissa, Altavera, Levora, Lillow, Kurvelo, Levlen, Nordette, Setlakin and Ayuna.