Is Using Diane For Acne And Hormonal Problems Dangerous?

I m 20 years old and i m currently using diane35 for my acne problem due to hormonal disorder. I want to use concerta because my midterms are coming and i want to do my best. So, I thought using concerta will increase my concentration. I need something to increase my concentration. However, I want to know does concerta and diane35 cause a problem in my body? Because i read diane35 caused some deaths and banned from some countries. I m terrified. So, what do you think about I m using both concerta and diane35? Thank you for your time :)