Alkermes, Inc. (NASDAQ: ALKS) today announced the initiation of a phase 1/2 study of ALKS 5461 for treatment-resistant depression (TRD). ALKS 5461 is the combination of ALKS 33, a proprietary opioid modulator, and buprenorphine. TRD, which is also known as refractory depression, refers to depressive episodes that are not adequately controlled by standard antidepressant therapy...