Dermira shares drop 63% after surprise acne clinical trial failure By: MarketWatch March 05, 2018 at 10:58 AM EST Acne is an enticing, if not particularly lifesaving, market for drugmakers, with more than $3 billion in revenue at stake. Read More >> Related Stocks: Allergan Plc Journey Medical Corp Melinta Therapeutics Inc Novan Inc Sol-Gel Technologies Ltd Valeant Pharmaceuticals International, Inc.