Dimetapp 12-Hour Nasal Spray in a 20ml bottle provides long-lasting relief from nasal congestion due to colds, allergies, or sinusitis. This spray contains oxymetazoline, a nasal decongestant that works by narrowing blood vessels in the nasal passages, reducing swelling and congestion. Dimetapp 12-Hour Nasal Spray offers up to 12 hours of relief, allowing for easier breathing and improved nasal airflow. Its fast-acting formula provides quick relief from nasal congestion, making it an effective solution for individuals seeking prompt and long-lasting relief from nasal congestion symptoms.