Relmada Therapeutics, Inc. announced that the European Patent Office has issued a notice of allowance for patent application number 13773543.7 for D-methadone for the treatment of psychiatric symptoms. The patent provides broad coverage in Europe for d-Methadone (dextromethadone, REL-1017), a novel N-methyl-D-aspartate (NMDA) receptor antagonist, for the treatment of symptoms associated with a range of psychological and psychiatric disorders including depression, anxiety, fatigue and mood instability. The NMDA receptor is a predominant molecular device for controlling synaptic plasticity and memory function and affects the transfer of electrical signals between neurons in the brain and in the spinal column. Based on their mechanism of action, a range of NMDA receptor antagonists (chemicals that deactivate the NMDA receptor) such as d-Methadone are under consideration as potential therapeutic agents for the treatment of many CNS conditions including some psychiatric disorders.