In some embodiments provided herein is a method of treating agitation associated with Alzheimer's disease in a subject, comprising administering to the subject therapeutically effective amounts of deuterated [d6]-dextromethorphan hydrobromide (d6-DM) and quinidine sulfate, wherein the subject is a patient that has been diagnosed as having Alzheimer's disease, wherein the method comprises determining the Cohen-Mansfield agitation inventory (CMAI) total score in the patient prior to said administration.

In some embodiments provided herein is a method of treating agitation associated with Alzheimer's disease in a subject, comprising administering to the subject therapeutically effective amounts of deuterated [d6]-dextromethorphan hydrobromide (d6-DM) and quinidine sulfate, wherein the subject is a patient that has been diagnosed as having Alzheimer's disease, wherein the method comprises determining the Cohen-Mansfield agitation inventory (CMAI) total score in the patient prior to said administration.

The invention provides methods and compositions for assaying infectivity of viruses and potential treatments of such viruses in the upper respiratory tract using an air-liquid interface model with nasal epithelium cells; and treatment of viral infections of the upper respiratory tract by treating with bitter taste receptor agonists that stimulate NO production and/or antimicrobial protein production.

The invention provides methods and compositions for assaying infectivity of viruses and potential treatments of such viruses in the upper respiratory tract using an air-liquid interface model with nasal epithelium cells; and treatment of viral infections of the upper respiratory tract by treating with bitter taste receptor agonists that stimulate NO production and/or antimicrobial protein production.

Disclosed herein is an injectable anticancer composition for local administration, which contains a suspension of quinine hydrochloride. The anticancer composition for local administration according to the present invention shows an IC.sub.50 value against MKN-45 cells, which is about 10 times lower than Paclitaxel, as determined by an MTT assay in vitro, suggesting that the anticancer composition has an excellent cytotoxic effect. The anticancer composition can be administered as a safe anticancer agent in clinical applications, and also shows an anticancer effect by inducing the necrosis and detachment of solid cancer cells. Particularly, the anticancer composition has an anticancer mechanism by which the composition acts locally in a tumor tissue administered with the composition and shows a rapid antitumor effect (1-2 weeks after administration).

Disclosed herein is an injectable anticancer composition for local administration, which contains a suspension of quinine hydrochloride. The anticancer composition for local administration according to the present invention shows an IC.sub.50 value against MKN-45 cells, which is about 10 times lower than Paclitaxel, as determined by an MTT assay in vitro, suggesting that the anticancer composition has an excellent cytotoxic effect. The anticancer composition can be administered as a safe anticancer agent in clinical applications, and also shows an anticancer effect by inducing the necrosis and detachment of solid cancer cells. Particularly, the anticancer composition has an anticancer mechanism by which the composition acts locally in a tumor tissue administered with the composition and shows a rapid antitumor effect (1-2 weeks after administration).

A therapeutic use of ascorbyl palmitate, ascorbic acid and/or derivatives thereof to reverse or counter the adverse effects of channel blockers in the medical management of cardiovascular disease in a subject is presented. Effects of select Na- and Ca-channel blockers on collagen synthesis and deposition were evaluated in cultured human dermal fibroblasts and aortic smooth muscle cells by immunoassay. Ca and Na-channel blockers inhibited the synthesis of collagen type I and collagen type IV, the basic molecules of vascular wall stability. The inhibitory effects of the calcium and sodium channel blockers on collagen synthesis was reversed by introducing ascorbic acid and/or ascorbyl palmitate. It can be concluded that calcium and sodium channel blockers have a direct inhibitory effect on collagen synthesis, favoring the instability of the vascular wall and the progression of cardiovascular disease, an effect that is mitigated by treatment with, ascorbyl palmitate, ascorbic acid and or derivatives thereof.

A therapeutic use of ascorbyl palmitate, ascorbic acid and/or derivatives thereof to reverse or counter the adverse effects of channel blockers in the medical management of cardiovascular disease in a subject is presented. Effects of select Na- and Ca-channel blockers on collagen synthesis and deposition were evaluated in cultured human dermal fibroblasts and aortic smooth muscle cells by immunoassay. Ca and Na-channel blockers inhibited the synthesis of collagen type I and collagen type IV, the basic molecules of vascular wall stability. The inhibitory effects of the calcium and sodium channel blockers on collagen synthesis was reversed by introducing ascorbic acid and/or ascorbyl palmitate. It can be concluded that calcium and sodium channel blockers have a direct inhibitory effect on collagen synthesis, favoring the instability of the vascular wall and the progression of cardiovascular disease, an effect that is mitigated by treatment with, ascorbyl palmitate, ascorbic acid and or derivatives thereof.

This disclosure provides pharmaceutical compositions comprising dextromethorphan in combination with quinidine, and methods for treating agitation and/or aggression in subjects with dementia by administering such compositions.

This disclosure provides pharmaceutical compositions comprising dextromethorphan in combination with quinidine, and methods for treating agitation and/or aggression in subjects with dementia by administering such compositions.