Nasal compositions, comprising an aqueous solution containing caffeine and/or theobromine in a total concentration of up to about 0.5 percent (w/v) and an aqueous carrier having a pH of about 6-8 and comprising physiologically acceptable salts of sodium, potassium and calcium. The nasal composition when used as a nasal spray or as nasal drops or irrigation fluid is able to clean the nasal passages and to stimulate nasal mucociliary clearance and, in contrast to nasal decongestants, may be used on a daily-basis for a period longer than 5 days.