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.
Generic Singulair. MONTELUKAST is used to prevent and treat the symptoms of asthma. It is also used to treat allergies. Do not use for an acute asthma attack. The lowest GoodRx price for the most common version of montelukast is around $11.45, 91% off the average retail price of $132.38. Compare leukotriene receptor antagonists.