The main island of Puerto Rico is the smallest and most eastern of the Greater Antilles. With an area of 3,515 square miles (9,104 km 2), it is the third largest island in the United States and the 82nd largest island in the world.
Answers. Best Answer: SINGULAIR is a prescription medicine approved to help control symptoms of asthma in adults and children 12 months and older and for relief of symptoms of indoor and outdoor allergies. But it is NOT an antihistamine, but rather an antileukotriene medication. Leukotrienes are chemicals released from a variety of allergic and immune cells, and may cause allergy symptoms, primarily nasal congestion.
Singulair is commonly used to prevent asthma attacks and allergy symptoms. Reports of serious psychological effects have not yet been confirmed. Singulair is commonly used to prevent asthma attacks and allergy symptoms.