I was using this spray meant to hasten recovery from the common cold. This study, sponsored by the pharmaceutical company that produces the spray, stated it reduced virus by 92%, and so shortens the duration of the common cold.
Meanwhile a doctor told me that these kinds of things don't work.
Does someone have some perspective on this? Is this a believable study? 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?