Depending on the cause of the problem, individuals can try several methods to stop post-nasal drip, including using saline sprays or nasal irrigation, taking medicine such as guaifenesin to thin mucus, using a humidifier and increasing water intake, states WebMD. Individuals with allergies may try antihistamines to decrease post-nasal drip.
People with allergies can also try decongestants and steroid nasal sprays to relieve post-nasal drip, according to the American Academy of Otolaryngology. Elevating the head of the bed while sleeping prevents mucus from collecting in the back of the throat. Reducing exposure to allergy triggers can also decrease post-nasal drip, states WebMD. Individuals with allergies should cover their mattresses and pillows with dust mite-proof covers, wash bedding frequently in hot water, dust and vacuum regularly, and use special air filters in their homes.
Antibiotics are required if a bacterial infection causes post-nasal drip, notes WebMD. Individuals should contact their doctor right away if their symptoms last more than 10 days or they experience symptoms of a bacterial infection, such as foul-smelling nasal drainage, fever and wheezing. Post-nasal drip that does not resolve with medication or other interventions may require further evaluation and testing, such as a CT scan or X-rays.