Cortopin 1% w/w Hydrocortisone Cream (15g). Cortopin hydrocortisone cream is a smooth white cream for application to the skin only. It contains hydrocortisone which is a corticosteroid.. Cortopin hydrocortisone cream is used to reduce inflammation in a variety of inflammatory skin conditions.. What is hydrocortisone cream used for?. mild to moderate eczema. dermatitis caused by irritants or allergens. cortopin for insect bites. How long does hydrocortisone cream take to work?. Your skin should start to get better after a few days.