Sienna Biopharmaceuticals, Inc. announced earnings results for the first quarter ended March 31, 2019. For the first quarter, the company announced operating loss was USD 15.839 million compared to USD 18.477 million a year ago. Net loss was USD 16.382 million compared to USD 17.103 million a year ago. Basic loss per share was USD 0.67 compared to USD 0.85 a year ago.