Rozy DS contains Drospirenone Ketoconazole
ModerateThe leaflet has a section on substances that raise the blood levels of hormonal contraceptives, and ketoconazole is one of the medicines it points to there. It describes a drug interaction study in premenopausal women involving drospirenone 3 mg with ethinyl estradiol, but the passage breaks off before any result is given. So the text names this pairing as an interaction without saying what the effect is.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.