TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: In the method: after the formation of 5-nitro-2,3-dihydrophthalazine-1,4-dione, the mixture of acetic acid with water is treated with acetic anhydride up to regeneration of anhydrous acetic acid; and the anhydrous lower alcohols or cyclic lower ethers are regenerated by treating water filtrates with alkalis with separation of the water and organic layers and distilling the organic layer off. ACTIVITY - Cardiant; Gastrointestinal-Gen; Antidiabetic; Neuroprotective; Nootropic; Neuroleptic; Antidepressant; Antiinflammatory; Antibacterial.    MECHANISM OF ACTION - Tumor necrosis factor- alpha production inhibitor; Proteolytic enzyme synthesis inhibitor; Histamine-2 receptor inhibitor; Arachidonic acid production inhibitor; Insulin-like growth factor-1 synthesis stimulator or inducer; Insulin-like growth factor-2 synthesis stimulator or inducer; Transforming growth factor- beta stimulator; Transforming growth factor-R stimulator; Post-inflammatory cytokine release blocker; Pathologic cytokine release inhibitor.    ADMINISTRATION - Administration of the composition comprising combination of sodium and lithium salts of 5-amino-2,3-dihydrophthalazine-1,4-dione, is in the form of injection, tablet, powder, nasal drops, eye drops, ear drops, aerosol, suppository, intravaginal globule, vaginal tablet, transdermal patch, transmucosal film, ointment, cream, dusting powder, gel, solution or tooth paste (claimed), of 20-2000 mg, by oral, tablets, intranasal, sublingual or intramuscular injections.    SPECIFIC COMPOUNDS - 2 Compounds (I) are specifically claimed i.e. 5-amino-2,3-dihydrophthalazine-1,4-dione sodium salt (Ia) and 5-amino-2,3-dihydrophthalazine-1,4-dione lithium salt.    EXAMPLE - Distilled water (540 ml), granulated caustic soda (16.2 g), 5-nitro-2,3-dihydrophthalazine-1,4-dione (82.9 g) and palladium catalyst (1 g) were purged two times with hydrogen for removal of oxygen from air, then hydrogen was let into the autoclave under the pressure of 1-2 MPa, at 75-90 degrees C for 5-6 hours and cooled. Then the catalyst was separated by filtration of the reaction mixture at the atmosphere of nitrogen. Alkalinity of the filtrate was controlled (pH not greater than 9.5), and active carbon (10 g) was added and kept at 30 degrees C, then the active carbon was filtered off. To the filtrate chemically purified isopropyl alcohol (1 l) was added and the mixture was cooled to -15 degrees C to give sodium salt dehydrate. The reaction mixture was worked up to give 5-amino-2,3-dihydrophthalazine-1,4-dione sodium salt.