Drug hypersensitivity epinephrine

Allergic states Control of severe or incapacitating allergic conditions intractable to conventional treatment in serum sickness and drug hypersensitivity reactions. Parenteral therapy is indicated for urticarial transfusion reactions and acute noninfectious laryngeal edema (epinephrine is the drug of first choice). 

The answers are 25-e, 26-b, 27-a. (Hardmanr pp 67—68. Katzung, pp 30, 134.) Anaphylaxis refers to an acute hypersensitivity reaction that appears to be mediated primarily by immunoglobulin E (IgE). Specific antigens can interact with these antibodies and cause sensitized mast cells to release vasoactive substances, such as histamine. Anaphylaxis to penicillin is one of the best-known examples the drug of choice to relieve the symptoms is epinephrine. 

The answer is a. (Hardman, p 224.) Epinephrine is the drug of choice to relieve the symptoms of an acute, systemic, immediate hypersensitivity reaction to an allergen (anaphylactic shock). Subcutaneous administration of a 1 1000 solution of epinephrine rapidly relieves itching and urticaria, and this may save the life of the patient when laryngeal edema and bronchospasm threaten suffocation and severe hypotension and cardiac arrhythmias become life-endangering. Norepinephrine, isoproterenol, and atropine are ineffective therapies Angioedema is responsive to antihis-... 

These dru are contraindicated in patients witii hypersensitivity to tiie drug or any component of the dmg. Epinephrine is contraindicated in patients with narrow angle glaucoma, or patients with a narrow angl but no glaucoma, aphakia (absence of the crystalline lens of tiie eye). Epinephrine should not be used while wearing soft contact lenses (discoloration of the lens may occur). 

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