My Daughter Had Been Told By A Private Dermatologist That

My daughter had been told by a private dermatologist that she would be a good candidate for dianette for her acne. Antibiotics have not worked and 3 different types tried over 2.5years. Her Gp however has prescribed her Femodene for her acne, saying of that doesn't work then she'll move her on to dianette. Your opinion on this please?