Higher doses of inhaled beclomethasone (more than 1000 mcg/day) may result in more absorption into the body. This may decrease bone formation and increase bone breakdown (resorption), resulting in weak bones and a risk of fractures . Even higher doses (more than 1500 mcg/day in adults and 400 mcg/day in children) may suppress the adrenal glands and impair their ability to make natural glucocorticoid. Patients with such suppression (which can be identified by testing) need increased amounts of glucocorticoid orally or by the intravenous route during periods of high physical stress since higher amounts of glucocorticoids are needed by the body to fight physical stress.
There is inadequate evidence of safety in human pregnancy. Administration of corticosteroids to pregnant animals can cause abnormalities of foetal development including cleft palate and intra-uterine growth retardation. There may therefore, be a risk of such effects in the human foetus. It should be noted, however, that the foetal changes in animals occur after relatively high systemic exposure. Beclometasone dipropionate is delivered directly to the lungs by the inhaled route and so avoids the high level of exposure that occurs when corticosteroids are given by systemic routes.