What is the generic name of Methadose?

A. Memantine hydrochloride functions as an N-methyl-D-aspartate receptor antagonist specifically indicated for the management of moderate to severe Alzheimer disease. It does not possess opioid receptor affinity. This pharmacological profile is entirely distinct from the therapeutic class of Methadose. B. Methadose is a proprietary brand name for methadone hydrochloride, a synthetic mu-opioid receptor agonist. It is clinically utilized for chronic pain management and opioid detoxification programs. The chemical nomenclature directly corresponds to this specific long-acting synthetic opioid analgesic. C. Morphine sulfate is a natural phenanthrene alkaloid derived from the opium poppy. While it shares the mu-opioid agonist mechanism, it is marketed under brand names such as MS Contin or Kadian. It is not the active moiety in Methadose. D. Montelukast sodium is a selective leukotriene receptor antagonist that inhibits the cysteinyl leukotriene CysLT1 receptor. It is indicated for prophylaxis of asthma and allergic rhinitis. It lacks any structural or functional relationship to the opioid analgesic methadone.