The present application relates methods for treating a depressive symptom comprising administering an effective amount of a opioid receptor agonist or a pharmaceutically acceptable salt thereof to a subject in need thereof. Non-limiting examples of such agonist include the compounds of Formulas I, II, III, and IV, as well as the compounds of Table A.

A novel compound which is useful as an agent for treating and/or preventing emesis, vomiting and/or constipation. A compound represented by the formula (I): ##STR00001##
wherein R.sup.1 and R.sup.2 are each independently hydrogen, optionally substituted lower alkyl, optionally substituted lower alkenyl, optionally substituted cycloalkyl, optionally substituted aryl etc., R.sup.3 is hydrogen, hydroxy, optionally substituted lower alkyl, optionally substituted lower alkenyl, optionally substituted lower alkynyl, optionally substituted lower alkoxy etc., R.sup.4 is hydrogen or lower alkyl, R.sup.5 is hydrogen, lower alkyl, cycloalkyl lower alkyl or lower alkenyl,
or a pharmaceutically .[.acceptably.]. .Iadd.acceptable .Iaddend.salt, or a solvate thereof is provided.

A novel compound which is useful as an agent for treating and/or preventing emesis, vomiting and/or constipation. A compound represented by the formula (I): ##STR00001## wherein R.sup.1 and R.sup.2 are each independently hydrogen, optionally substituted lower alkyl, optionally substituted lower alkenyl, optionally substituted cycloalkyl, optionally substituted aryl etc., R.sup.3 is hydrogen, hydroxy, optionally substituted lower alkyl, optionally substituted lower alkenyl, optionally substituted lower alkynyl, optionally substituted lower alkoxy etc., R.sup.4 is hydrogen or lower alkyl, R.sup.5 is hydrogen, lower alkyl, cycloalkyl lower alkyl or lower alkenyl, or a pharmaceutically acceptably salt, or a solvate thereof is provided.

The present application relates methods for treating a depressive symptom comprising administering an effective amount of a opioid receptor agonist or a pharmaceutically acceptable salt thereof to a subject in need thereof. Non-limiting examples of such agonist include the compounds of Formulas I, II, III, and IV, as well as the compounds of Table A.

The present application relates methods for treating a depressive symptom comprising administering an effective amount of a opioid receptor agonist or a pharmaceutically acceptable salt thereof to a subject in need thereof. Non-limiting examples of such agonist include the compounds of Formulas I, II, III, and IV, as well as the compounds of Table A.

Provided herein are methods for treating pain such as acute or chronic pain or fever in subject without risking hepatotoxicity. The subject may be at risk of hepatotoxicity if administrated an acetaminophen monomer. The method includes administering a pharmaceutical composition containing an acetaminophen dimer compound, wherein the phenolic hydroxyl groups of two acetaminophen compounds are linked via an ethylene spacer.

The present invention provides (+)-morphinans comprising Toll-like receptor 9 (TLR9) antagonist activity, as well as methods for using the (+)-morphinans to treat pain. Also provided are pharmaceutical combination compositions comprising a (+)-morphinan and an opioid agonist/monoamine reuptake inhibitor, as well as methods for using the combination compositions to treat pain.

The present invention provides (+)-morphinans comprising Toll-like receptor 9 (TLR9) antagonist activity, as well as methods for using the (+)-morphinans to treat pain. Also provided are pharmaceutical combination compositions comprising a (+)-morphinan and an opioid agonist/monoamine reuptake inhibitor, as well as methods for using the combination compositions to treat pain.

The present invention provides (+)-morphinans comprising Toll-like receptor 9 (TLR9) antagonist activity, as well as methods for using the (+)-morphinans to treat pain. Also provided are pharmaceutical combination compositions comprising a (+)-morphinan and an opioid agonist/monoamine reuptake inhibitor, as well as methods for using the combination compositions to treat pain.

The present invention provides method and compositions for the treatment of peripheral neuropathic pain by administering to a patient a therapeutically effective amount of a buprenorphine dimer compound, wherein the two buprenorphine portions are linked via an ethylene spacer, and wherein the spacer is bonded to the two opioid molecules via an ether bond. Preferably, the active agent is provided in the form of an injectable depot.