Every year, more and more people all over the world use OTC or over the counter products to relieve specific health problems, nasal stuffiness, congestion, sneezing, runny nose, cough and sore throat are the most common reason for this. These ailments are often caused by viruses in the air that cause common colds, sinus infections or sinusitis, influenza virus and allergic rhinitis or also known as hay fever. Other infections that are viral can also cause headache, body aches, fatigue and even fever. Allergic rhinitis can also cause itchy eyes, nose and throat and teary eyes.