Diseases accompanied by hypocalcemia, increased permeability of cell membranes, impaired nerve impulses in muscle tissue. Hypoparathyroidism (latent tetany, osteoporosis), impaired metabolism of vitamin D (rickets, spasmophilia, osteomalacia), hyperphosphatemia in patients with chronic renal failure. Increased need for calcium (period of intensive growth of children and adolescents, pregnancy, breastfeeding period), insufficient calcium in food, impaired metabolism in the postmenopausal period, bone fractures. Increased calcium excretion (prolonged fasting, chronic diarrhea, hypocalcemia with prolonged diuretics, antiepileptic drugs, glucocorticosteroids). In complex therapy: bleeding of various etiologies, allergic diseases (serum sickness, urticaria, catarrh syndrome, itching dermatoses, angioneurotic edema); bronchial asthma, dystrophic alimentary edema, pulmonary tuberculosis, eclampsia, parenchymal hepatitis, toxic liver damage, nephritis. Poisoning with magnesium salts, oxalic acid, soluble salts of fluoric acid (insoluble and non-toxic calcium oxalate and calcium fluoride are formed upon interaction with calcium gluconate).