For the multiple-dose studies, only one study used oral psuedoephedrine 60 mg.8 No significant benefit was found for the symptom of congestion after repeated doses of decongestant over a 5-day period. Again, no discrete data were reported, hence NNTB could not be calculated. Because of the lack of other studies to support this result, no conclusion can be drawn on the efficacy of repeated doses of decongestant.