Delayed recovery from naturally infected upper respiratory tract infections by loxoprofen: a randomized controlled trial

INTERVENTION: Patients in the intervention group take loxoprofen sodium (60 mg/tablet) and those in the control group take a placebo similar to active loxoprofen CONDITION: Upper Respiratory Tract Infection (URTI) ; Respiratory ; Upper respiratory tract infection (URTI) PRIMARY OUTCOME: The interval, in days, from the onset of any URTI symptom to the disappearance of all URTI symptoms SECONDARY OUTCOME: Severity of the URTI symptoms INCLUSION CRITERIA: Patients aged 18 through to 65 years who exhibit symptoms or signs in both the nose and pharynx and have visited physicians within 48 hours after symptom onset