Efficacy of safety of concurrent use of intranasal flunisolide and oral beclomethasone aerosols in treatment of asthmatics with rhinitis.

Steroid-dependent, chronic asthmatic patients with severe rhinitis or nasal polyps are often candidates for treatment with intranasal topical corticosteroids, such as flunisolide. The possibility of additive adrenal suppression, when flunisolide, beclomethasone and prednisone are given together, has not previously been studied. The need to asses the risk is suggested by reports of additive adrenal suppression when aerosol and oral steroids are used together to treat asthma, and by the demonstrably higher systemic availability of aerosol steroid given intranasally rather than via the lung. We performed a double-blind, placebo-controlled crossover assessment of the efficacy and safety of 3 weeks of intranasal flunisolide spray treatment (300 micrograms/day) in nineteen steroid-dependent chronic asthmatic subjects, who also had nasal polyps or severe rhinitis. During the study, their doses of prednisone and beclomethasone, used for asthma, were held stable. Morning serum cortisol levels and 24-hr urinary-free cortisol excretion were essentially the same after the placebo, and the flunisolide treatments. The intranasal flunisolide improved their nasal symptoms significantly (P less than 0.05). Local complications were negligible. Given conventional steroid doses like those used in this study, there appears to be no important risk to endogenous adrenal function from combining the use of intranasal, flunisolide spray with administration of other steroids by other routes, when this is deemed clinically necessary. If higher doses are used, the possibility of some additive adrenal suppressive effect cannot be excluded.