I don’t advise over-the-counter medications, but one simple treatment you can try that is surprisingly effective against upper respiratory infections is hydrogen peroxide.
Many patients at my Natural Health Center have had remarkable results in curing colds and flu within 12 to 14 hours when administering a few drops of 3 percent hydrogen peroxide (H2O2) into each ear. You will hear some bubbling, which is completely normal, and possibly feel a slight stinging sensation.
Wait until the bubbling and stinging subside (usually 5 to 10 minutes), then drain onto a tissue and repeat with the other ear. A bottle of hydrogen peroxide in 3 percent solution is available at any drug store for a couple of dollars or less. It is simply amazing how many people respond to this simple, inexpensive treatment.
Source and further information :