Comparative Efficacy of the Suppository Versus Guaiacol Suppository Versus Guaifenesin Syrup in Pediatric Patients With Cough Due the Infectious Origin

Inclusion Criteria: * Patients that parents or legal guardians agree to their participation in the study and agree on the terms proposed in the IC, signing it; * Patients aged ≥ (greater than or equal to) 02 years and ≤ (less than or equal to) 6 years, 11 months and 29 days, of any ethnicity, class or social group. * Patients with acute respiratory disease of upper respiratory viral diseases (URI); * Patients with productive cough; * Clinical picture of URI defined by the doctor that started less than 48 hours. Exclusion Criteria: * Patients being treated with antibiotics; * Presence of clinical features of bacterial infection of the upper airways and / or pulmonary (acute bacterial sinusitis, pneumonia, etc.). * Patients with non-productive cough; * Treatment with immunosuppressive drugs; * Presence of any medical condition that, according to the investigator, should prevent the patient from the study; * Participation in clinical trials in the 12 months preceding the study, according to Resolution 251 (ANVISA), August 7, 1997, item III, sub-item J; * Patients with serious diseases; * Patients who require multidrug treatment; * Presence of other concomitant pulmonary diseases * History of hypersensitivity to drugs of the same pharmacological classes of substances under investigation; * Patients with diseases that interfere with lung function, such as cerebral palsy or muscular atrophies; * Patients under medication or supplement (eg physiotherapy) that may interfere with the cough; * Patients with severe dysfunction of the hepatorenal function; * Patients with x-ray of the chest or sinus compatible with picture of bacterial infection; * Patients with blood cell count suggestive of bacterial infection; * Changes in laboratory, clinical, physical and / or radiological agents that, judged by investigators, could compromise patient health or reliability of the data.