The document summarizes information about three common over-the-counter or prescription drugs: Robitussin, Allegra, and Ventolin. Robitussin is an expectorant that helps loosen chest and throat congestion. Allegra is an antihistamine that reduces sneezing, itching, and other allergy symptoms. Ventolin is a bronchodilator used to treat wheezing and shortness of breath from conditions like asthma. For each drug, dosage and administration instructions are provided as well as potential side effects.