(The Conversation) – It starts with a slight scratchiness at the back of your throat. Then, a sneeze. Then coughing, sniffling and full-on congestion, with or without fever, for a few insufferable ...

There are plenty of over-the-counter remedies for the common cold, but some carry significant risks, and their efficacy is dubious. The latter applies to phenylephrine, an active ingredient in common ...