Allegra is an antihistamine that reduces histamine in the body to relieve symptoms of sneezing, itching, watery eyes, and runny nose caused by allergies. Robitussin contains guaifenesin, an expectorant that helps loosen congestion in the chest and throat to make coughing easier. Flonase is a nasal spray containing the corticosteroid fluticasone that prevents inflammation and treats nasal symptoms like congestion from allergies.

1. Respiratory PrescriptionDrugs

2. Allegra Generic Name: fexofenadine (FEX oh FEN a deen) Brand Names: Allegra, Allegra ODT

3. Allegra (fexofenadine) is an antihistamine that reduces the natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose Allegra is also used to treat skin itching and hives caused by a condition called chronic idiopathic urticaria in adults and children.

4. Robitussin Generic Name: guaifenesin (oral) (gwye FEN e sin) Brand Names: Duratuss G, Ganidin NR, GG 200 NR, Guaifenesin LA, Liquibid, Muco-Fen 1200, Organidin NR, Q-Bid LA, Robitussin, Scot-Tussin

5. Guaifenesin is an expectorant. It helps loosen congestion in your chest and throat, making it easier to cough out through your mouth. Guaifenesin is used to reduce chest congestion caused by the common cold, infections, or allergies.

6. Flonase Generic Name: fluticasone nasal Brand Names: Flonase, Veram

7. Flonase is a nasal spray containing the corticosteriodfluticasone. It prevents the release of substances in the body that cause inflammation. Flonase is used to treat nasal symptoms such as congestion, sneezing, and runny nose caused by seasonal or year-round allergies.