Interesting to see this kind of science. A rare win in todays medical landscape for consumers.

Schering-Plough, the maker of Claritin D (loratadine and pseudoephedrine), was already studying phenylephrine as an alternative oral decongestant. In addition to funding two studies that found phenylephrine was no better than placebo when patients with seasonal allergies were exposed to allergens (grass and ragweed) in a controlled chamber, they funded additional research.

Source: Scientific American