The document discusses three types of prescription drugs: Allegra, Afrin, and Ventolin. Allegra is an antihistamine used to treat seasonal allergy symptoms and skin itching. Afrin is a decongestant nasal spray that works by constricting blood vessels to reduce nasal congestion associated with allergies and colds. Ventolin is a bronchodilator used to treat bronchospasm and prevent exercise-induced asthma by relaxing airway muscles to make breathing easier.