• Less than 12 years old.
• Pregnancy.
• Signs of infections (ear, throat or sinus infections) including fever, pus formation (pus like discharge from the nose), diarrhea, vomiting, or pain of the sinuses.
• Symptoms that have not resolved after a week of using over the counter products.
• COPD, asthma, or symptoms such as shortness of breathe, or wheezing.
• These symptoms have been occurring more than 4 days per week for more than 4 weeks, and are resulting in impaired sleep or other daily activities.
• Allergic to OTC medications or experience severe side effects from taking them.