• Less than 2 years old.
• Fever over 101.5 F.
• Symptoms have gotten worse or new symptoms have developed after trying an over the counter treatment.
• Asthma, COPD or other respiratory condition.
• Cardiovascular condition such as congestive heart failure.
• Chest pain.
• Shortness of breathe.
• Immunosuppression (weakened immune system) from medications or from a health condition.
• AIDS.
• Elderly and frail.
• Allergic or hypersensitive to OTC medications.
• Pregnancy.