Hey baileybird,
My friend has just come off Dianette at the age of 18, she has only been on it for around 6 months but she has had endless problems with it. It has given her terrible mood swings (more so than normal!), she cries for no reason, has constant headaches, and has been sick around 6 times since she has been on it.
Whether these are a definite link to Dianette I'm not 100% sure but she certainly seems to think so.
She originally went on to clear her skin up as she's suffered from acne for years. Tried antibiotics, and at the same time had a special roll-on liquid, and she believes it is the liquid that has worked more than anything!
Dianette is probably a very successful pill to be on, I just thought you could have an opinion for both sides of the argument!
Hope all goes well with your daughter. x