SN instructed patient that Beclometasone dipropionate is a potent glucocorticoid steroid. In the form of an inhaler ( Clenil, Qvar ), a wide number of brands of which are available, it is used for the prophylaxis of asthma. As a nasal spray, it is used for the treatment of rhinitis (hay fever and sinusitis). In some instances, it is used by oral pathologists in the treatment of unusually severe aphthous ulcers. Possible side effect / adverse reaction: occasionally, it may cause a cough upon inhalation. Deposition on the tongue and throat may promote oral candidiasis, which appears as a white coating, possibly with irritation. This may usually be prevented by rinsing the mouth with water after using the inhaler. Other side effect may rarely include: a smell similar to burning plastic, unpleasant taste, hoarseness or nasal congestion, pain or headache, and visual changes. Allergic reactions may occur, but rarely. Nasal corticosteroids may be associated with central serous retinopathy