Phase 4 Study - Mucinex D as Adjunct Therapy

Inclusion Criteria: * Ages Eligible for Study: 18 to 75 years, * Genders Eligible for Study: Both * Adult patients presenting at the physician's office with symptoms diagnostic for acute respiratory infection, such as bronchitis or rhinosinusitis; with a clinical diagnosis of acute respiratory infection, meeting the physician's usual diagnostic criteria in practice for prescription of oral antibiotics. * The investigator will evaluate patients on a total of seven criteria for inclusion. Exclusion Criteria: * Have chronic, recurring respiratory signs and symptoms, such as allergic rhinitis or chronic bronchitis, which, in the investigator's opinion, would confound interpretation of symptoms ratings for the acute respiratory infection; * The Investigator will evaluate patients on twelve additional criteria for exclusion.