Blocked nostrils and throat irritation can worsen at night due to dryness or post-nasal drip. Use Otrivin only for a short period, take warm fluids, try steam inhalation before bed, and keep your head slightly elevated while sleeping. Consult a doctor if symptoms persist.

After a cold, a dry cough can linger and often gets worse in air-conditioned or closed rooms because the dry air irritates the throat. Ambrolite D may help reduce coughing if advised by a doctor, but steam inhalation, warm fluids, and limiting AC exposure can also provide relief.