A 16-year-old adolescent has been hospitalized with complaints of unceasing nasal hemorrhage and unbearable pain in his right elbow joint. Objectively: the large joint is enlarged and defigurated, the skin over the joint is hyperemic. Arthropathy signs can be observed in the other joints. Ps- 90/min.
Blood test: erythrocytes - 3, 9 • 1012/l, Нb- 130 g/l, color index - 1,0, leukocytes - 5, 6 • 109/l, platelets - 220 • 109/l, ESR- 6 mm/hour. Lee-White coagulation time: start- 24 , end-27 10 . What drug would be most efficient in the treatment of this patient? *