CANTON, Mass., June 20, 2016 (GLOBE NEWSWIRE) — Collegium Pharmaceutical, Inc. (Nasdaq:COLL) today announced the commercial launch of Xtampza® ER (oxycodone) extended-release (ER) capsules in the United States. Xtampza ER was approved by the U.S. Food and Drug Administration (FDA) for the management of pain severe enough to require daily, around-the-clock, long-term opioid treatment and for which alternative treatment options are inadequate.