Home remedies are usually effective in treating congestion. Saline nasal and a humidifier can moisten the air and keep nasal passages from drying out. Drink lots of fluids, especially hot tea, broth or chicken soup. Decongestants (to shrink the blood vessels in the nasal passages) and antihistamines (to reduce the amount of mucus) provide quick relief, but they are only effective for a few days. If used longer, they may actually worsen the condition.