Hello, Thanks for posting your query. Upper respiratory infections can be caused by viruses, bacteria, or other microscopic organisms. The common cold is the most common upper respiratory tract infection. A nasal wash can be helpful for removing mucus from the nose. Dozens of remedies are available that combine ingredients aimed at more than one cold or flu symptom. In general, they do no harm, but they have the following problems: Some ingredients may produce side effects without even helping a cold. In some cases, the ingredients conflict (such as a cough expectorant and a cough suppressant). In other cases, a patient may wish to increase the dosage to improve one symptom, which serves to increase other ingredients that do no good and, in higher doses, may cause side effects. Hope I have answered your query. Wishing you good health. Regards.