Sinusitis is an inflammation or swelling of the tissues that line our sinuses. Sinuses are air-filled spaces within our skull that help to filter and moisten the air we breathe, give resonance to our voices and make our skull lighter. We have four pairs of sinuses in total, located between the eyes and behind the forehead, nose, and cheeks. Below you may find medications used to treat or help with Sinusitis. More about Sinusitis