Nasal decongestant/Antihistamine. Smaller capsule for easier swallowing. 12 Hour Relief: Nasal and sinus congestion; Runny nose and sneezing; Itchy, watery eyes. Each Contac capsule contains tiny time pills, over 700 medicine beads. Some go to work right away. The rest are scientifically timed to dissolve slowly to give up to 12 hours of relief of nasal & sinus congestion, runny nose & sneezing, itchy, watery eyes, itching of the nose and throat.