I was using this spray meant to hasten recovery from the common cold. A study , sponsored by the pharmaceutical company that produces the spray, stated it reduced virus by 92% (this value only appear on the promotional material), and so shortens the duration of the common cold.
Meanwhile a doctor told me that these kinds of things don't work.
I found some "similar" studies [2,3, 4, 5 ,6] but I lack the competence to assert their value.
Does someone have some perspective on this? Are these believable studies? Was it well designed, and has it been duplicated?
If so, why wouldn't the pharmaceutical produced a certified and expensive drug instead of a no-prescription drug? I would think anything that would hasten common cold would get an enormous buzz (and profit...).
 https://clinicaltrials.gov/ct2/show/NCT01944631  http://www.mrmjournal.com/content/9/1/57  http://www.medscape.com/viewarticle/819411  http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2923116/  http://www.ncbi.nlm.nih.gov/pubmed/25411637  http://respiratory-research.com/content/14/1/124