Are diane-35 and diane the same? my box only says diane and it contains 21 pills

Ethinylestradiol: The content of ethinylestradiol is the key to your question. Diane-35 contains 35 micrograms of it in each pill - Diane may contain the same amount, or, if anything, then less, e.g., 30 micrograms.

Probably: Diane-35 carries the "35" designation because it contains 35 micrograms of EthinylEstradiol. Look at the listed active ingredients on the box and if it says .035 grams (or 35 microgrmas) of ethinylestradiol it is the same. Diane-35 has been banned in some countries such as France and Australia because of a rash of deaths from blood clots. It is usually only used for acne no. Best wishes!