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As practice shows, there are many alternative drugs that cause drug damage to the liver. A case of medicinal damage to the liver with an immunomodulatory herbal preparation Immunostimulating collection, which included St. John's wort, Elecampane, Kopeichnik, Echinacea, Licorice, Rosehip, is presented. A 39-year-old patient came to the clinic with complaints of yellowing of the skin, whites of the eyes, heaviness in the epigastrium after eating, lightening of feces, dark urine, sour taste in the mouth, bloating, pruritus, decreased appetite, pronounced general weakness, drowsiness 10 days after you start taking herbal immunostimulant. The diagnosis of drug damage to the liver was made taking into account the history and laboratory parameters, since the patient had negative markers of viral hepatitis and increasing of biochemical blood tests: alanine transferase up to 2800 U/l (norm up to 32 U/L), aspartate transferase up to 1776 U/l (norm up to 31 U/l), total bilirubin up to 577 U/l (norm up to 21 U/l), direct bilirubin up to 116 U/l (norm up to 4.3 U/l), alkaline phosphatase up to 112 U/l (norm up to 98 U/l). After the withdrawal of the immunomodulator and the appointment of therapy, including diet, enzyme replacement therapy, drugs clinical and laboratory manifestations of liver drug damage completely disappeared. This confirms the leading role of the immunoactive drug, which the patient took in the toxic effect on the liver.

The review considers the chemical structure, pharmacodynamics and pharmacokinetics of telaprevir, a new direct-acting antiviral agent, used to treat patients with chronic hepatitis C (CHC). The given data on Phase II and III clinical trials enable the authors to state the high efficacy of the drug in patients infected with hepatitis C virus type 1. The paper also provides data on the resistance of telaprevir and its drug interaction and denotes the place of the drug in the current antiviral treatment of patients with CHC.