A 27-year-old patient with a history of ronchial asthma was stung by a bee. He had a sensation of chest compression, breath shortage, difficult expiration, sense of heat in the upper half of body, dizziness, apparent itch, convulsions. Objectively: noisy wheezing breath, AP - 90/60 mm Hg, Ps- 110 bpm. Auscultation revealed weak rhythmic heart sounds, rough respiration above lungs, sibilant rales. What drug group should be administered in the first place?