Danex 2% Solution 50 ml is used to treat fungal infections of the skin like ringworm, jock itch, athlete's foot, seborrheic dermatitis (dry, flaky skin on the face, scalp, chest, upper back or ears) and pityriasis (a type of skin rash that causes scaly, discoloured patches on chest, back, legs and arms). It contains Ketoconazole which works by damaging the fungal cell membranes that are essential for their survival. Thus, it kills fungi and yeast. It may cause common side effects such as dry skin, itching, redness or burning sensation at the application site. Before using this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.