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  • Title: Propranolol-related bronchospasm in patients without history of asthma.
    Author: Fraley DS, Bruns FJ, Segel DP, Adler S.
    Journal: South Med J; 1980 Feb; 73(2):238-40. PubMed ID: 7355327.
    Abstract:
    Three patients with no history of asthma or allergy developed bronchospasm while taking propranolol for hypertension. The bronchospasm was severe in all three and in one patient resulted in respiratory arrest. Since the bronchospasm was relieved with discontinuation of propranolol and supportive bronchodilator therapy, the bronchospasm was believed to be caused by propranolol. Furthermore, each patient was subsequently treated with other antihypertensive medications which, like propranolol, contain the stabilizer additive tartrazine. Bronchospasm did not recur, making it unlikely that tartrazine hypersensitivity caused this problem. Regardless of a negative history of asthma, therefore, life-threatening bronchospasm must be considered a possible complication of propranolol therapy.
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