Moderate exercise may reduce the risk of upper respiratory tract infec
tions, but intense training can increase that risk. Though the average
cold does not appear to hinder athletic performance, short-term sympt
omatic treatment consisting of topical decongestants and/or nasal ipra
tropium bromide may be useful for active patients. Vitamin C and zinc
lozenges may reduce the duration of cold symptoms. Antibiotics are app
ropriate for treating such complications as acute bacterial sinusitis,
otitis media, or pneumonia but are ineffective against viral infectio
n. Some drugs are banned by sports organizations, and others, such as
first-generation antihistamines, may impair performance.