There is a problem with the studies these pharmacists are referencing. They are measuring nasal resistance, however, the measurement is not sufficient to capture the combination of things that make up nasal resistance. It's a combination of how much mucus is being secreted vs the degree of sinus inflammation.
New theory: Allergy sufferers are likely primarily experiencing sinus inflammation. Pseudoephedrine is the better solution for that. For those of us who are dealing with secretion - phenylephrine is effective.
Read that again in context to the two people who found the science of why it does not work..
You are defeating your argument...