 BENSALEM, Pa.--BUSINESS WIRE--- ACRX CLASSACTION--Law Offices of Howard G. Smith announces an investigation on behalf of AcelRx Pharmaceuticals, Inc. AcelRx or the Company NASDAQ: ACRX investors concerning the Companys possible violations of federal securities laws. AcelRx is a pharmaceutical company that develops therapies for the treatment of acute pain. One of its lead product candidates is DSUVIA, which has been approved by the U.S. Food and Drug Administration FDA for the management of acute pa 