[Experience with individual corticosteroid therapy of bronchial asthma in middle-aged and elderly patients (controlled by monitoring of blood tyrosine level)].

Blood level of tyrosine as a new clinical and laboratory indicator has been studied in bacterial asthma patients of advanced age. Tyrosine is known to affect metabolism of glucocorticoid hormones (GHs) thus reflecting GHs status of the body and permitting valid evaluation of the need in corticosteroid therapy.