Study Comparing Coristina® D to Resfenol® in the Symptomatic Treatment of Common Cold

Inclusion Criteria: 1. Sign and date the informed consent form; 2. Age between 18 and 60 years old; 3. Symptoms of common cold not exceeding 72 hours must be present; 4. It will be considered symptoms of the common cold the presence of at least 2 of the 10 symptoms following: runny nose, sneezing, nasal congestion, headache, myalgia, throat discomfort or sore throat, hoarseness, cough or fever. Each of the symptoms listed above will receive a score by Likert scale (no symptom = 0, mild symptoms = 1, moderate symptoms = 2, intense symptoms = 3). The minimum total is 0 and maximum one is 30, which included patients with score higher or equal to 4 points. Exclusion Criteria: 1. Presence of suggestive symptoms or prior diagnosis requiring regular and continuous treatment of allergic rhinitis or asthma in the last 2 years; 2. Chronic disease of any kind that is contraindicate the participation of the patient based on the opinion of investigator; 3. Hypersensitivity or contraindication to use of components of the study medications; 4. Pregnant or women of childbearing age without adequate contraception; 5. Use of other anti-influenza drugs programmed during the study or for the last 5 days; 6. Regular active smokers (more than 3 cigarettes a day); 7. Participation in another clinical study in less than one year (unless justified benefit by the investigator).