A systemic derivative of vitamin A used as a therapy in selected severe cases of psoriasis. Brand name Tegison. Soon to be phased out in favor of Soriatane (see acitretin).
Etretinate (trade name Tegison®) is a medication used to treat severe psoriasis. It was removed from the United States market in 1998 and the Canadian market in 1996, due to the high risk of birth defects.