Oxymetazoline Hydrochloride Nasal Solution IP 0.05% w/v is a fast-acting nasal decongestant that provides relief from nasal stuffiness due to colds, allergies, and sinus infections. It works by constricting blood vessels in the nasal passages, reducing swelling and mucus. It offers relief within minutes and typically lasts up to 12 hours. However, it should not be used for more than 5 consecutive days to avoid rebound congestion.