Calcium pantothemate in the daily dose 300 mg and 600 mg and pantetheine in the dose 90 mg and 180 mg per os were applied for 3-4 weeks in combined therapy of 156 patients with viral hepatitis A. In addition to the positive clinico-biochemical effect, these drugs produced an immunomodulatory action and a beneficial effect on the level of blood serum immunoglobulins and the phagocytic activity of peripheral blood neutrophils. Pantetheine provided the most pronounced therapeutic effect.