Iatrogenic Cushing's syndrome in an HIV-infected patient treated with inhaled corticosteroids (fluticasone propionate) and low dose ritonavir enhanced PI containing regimen.

In HIV-infected patients, ritonavir, a potent cytochrome P450 inhibitor, is increasingly used to improve the pharmacokinetic profile of the associated protease inhibitor. HIV physicians are often faced with potential drug-drug interaction while treating associated diseases. We report the case of an HIV-infected patient with clinical features of Cushing's syndrome due to the interaction of low dose ritonavir with inhaled fluticasone propionate (FP). Safety of life-long CYP450 inhibition has still to be demonstrated. Copyright 2002 The British Infection Society.