Digex NF is part of the Anticholinergics class and treats Nasal Congestion, Cold Symptoms, Cystitis and other conditions. Anticholinergics are used for pupil dilation and to treat irritable bowel syndrome, peptic ulcers, Parkinson's disease, allergic rhinitis, COPD, salivation, nausea, and motion sickness. They work by relaxing certain muscles in the body to control spasms. Digex NF is only available as a brand name drug.