Provided herein are transdermal delivery devices comprising ketamine, such as monolithic transdermal patches. Also provided herein are methods of preparing transdermal delivery devices. The transdermal delivery device and monolithic patch herein can have various uses, for example, for treating various diseases or disorders, such as depression, anxiety, and/or pain in a subject in need thereof.

The present embodiments are directed, in part, to 5-membered aza-heterocyclic containing delta-opioid receptor modulating compounds, such as those of Formula I, or pharmaceutically acceptable salts thereof, or pharmaceutical compositions thereof for modulating the activity of delta opioid receptor, biased and/or unbiased, and/or methods for treating pain, migraines, headaches, depression, Parkinson's Disease, anxiety, and/or overactive bladder, and other disorders and conditions described herein or any combination thereof.

The present embodiments are directed, in part, to 5-membered aza-heterocyclic containing delta-opioid receptor modulating compounds, such as those of Formula I, or pharmaceutically acceptable salts thereof, or pharmaceutical compositions thereof for modulating the activity of delta opioid receptor, biased and/or unbiased, and/or methods for treating pain, migraines, headaches, depression, Parkinson's Disease, anxiety, and/or overactive bladder, and other disorders and conditions described herein or any combination thereof.

According to the invention there is provided a compound of formula A1 which may be useful in the treatment of a condition or disorder ameliorated by the inhibition of the A.sub.1-A.sub.2b or, particularly, the A.sub.2a receptor wherein the compound of formula A1 has the structure, wherein, A represents Cy.sup.1 or Het.sup.A; Cy.sup.1 represents a 5- to 14-membered aromatic, fully saturated or partially unsaturated carbocyclic ring system comprising one, two or three rings, which Cy.sup.1 group is optionally substituted by one or more R.sup.4a substituents; Het.sup.A represents a 5- to 14-membered heterocyclic group that may be aromatic, fully saturated or partially unsaturated, and which contains one or more hetermatoms selected from O, S and N, which heterocyclic group may comprise one, two or three rings and which HetA group is optionally substituted by one or more R4b substituents; B represents a Cy.sup.2 or Het.sup.B; Cy.sup.2 represents a 3- to 10-membered aromatic, fully saturated or partially unsaturated carbocyclic ring system comprising one or two rings, which Cy.sup.2 group is optionally substituted by one or more R.sup.4c substituents; Het.sup.B represents a 3- to 10-membered heterocyclic group that may be aromatic, fully saturated or partially unsaturated, and which contains one or more heteroatoms selected from O, S and N, which heterocyclic group may comprise one or two rings and which Het.sup.B group is optionally substituted by one or more R.sup.4d substituents.

##STR00001##

Disclosed herein are tricyclic compounds, including pyrimido[4′,5′:4,5]thieno[2,3-c]pyridazine-8-amine, pyrido[3′,2′:4,5]thieno[3,2-d]pyrimidine-4-amine, pyrazino[2′,3′:4,5]thieno[3,2-d]pyrimidin-4-amine, pyrido[3′,2′:4,5]furo[3,2-d]pyrimidin-4-amine, and pyrimido[4′,5′:4,5]furo[2,3-c]pyridazin-8-amine compounds, which may be useful as positive allosteric modulators of the muscarinic acetylcholine receptor M.sub.4 (mAChR M.sub.4). Also disclosed herein are methods of making the compounds, pharmaceutical compositions comprising the compounds, and methods of treating neurological and psychiatric disorders associated with muscarinic acetylcholine receptor dysfunction using the compounds and compositions.

The present invention aims to provide a novel compound having a high mPTP-opening inhibitory activity and/or a useful therapeutic effect on various diseases. An aspect of the present invention relates to a mitochondrial permeability transition pore (mPTP)-opening inhibitor, a medicament or a pharmaceutical composition comprising a compound represented by formula (I), wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8, R.sup.9, R.sup.10 and R.sup.11 are the same as defined in the specification and the claims, a stereoisomer thereof, a prodrug thereof, or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable solvate thereof, as an active ingredient. Another aspect of the present invention relates to a compound represented by formula (Ia), wherein R.sup.1a, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8, R.sup.9, R.sup.10 and R.sup.11 are the same as defined in the specification and the claims, a stereoisomer thereof, a prodrug thereof, or a salt thereof, or a solvate thereof.

Provided herein are methods for treating depression, such as major depressive disorder, in a subject in need thereof, comprising administering to the subject an effective amount of Compound 1 or a pharmaceutically acceptable salt thereof.

##STR00001##

Provided herein are methods for treating depression, such as major depressive disorder, in a subject in need thereof, comprising administering to the subject an effective amount of Compound 1 or a pharmaceutically acceptable salt thereof.

##STR00001##

An 8-substituted styryl xanthine derivatives and uses thereof, specifically, relates to a novel 8-substituted styryl xanthine derivative and a pharmaceutical composition containing this compound, which can be selective adenosine A.sub.2A receptor antagonist, and also relates to methods of preparing this compound and pharmaceutical composition, and uses thereof in the manufacture of a medicament for treating an adenosine A.sub.2A receptor-related disease, especially Parkinson's Disease.

The present invention relates to methods and compositions for the treatment of psychiatric disorders such as treatment-resistant depression (TRD) with KCNQ (also known as Kv7) channel openers. Also disclosed is a method of inducing or enhancing resilience in a patient by administration of a KCNQ channel opener, such as ezogabine.