No
you don't!
Not usually, Mupirocin, topical antibiotic, is used to treat impetigo as well as other skin infections caused by bacteria. Available by prescription.
Robitussin is very effective. Menthol cough drops work well too.
Over the counter medication allows people to freely acquire medications that they may need without having to wait for a prescription. Now, you definitely can't go to a pharmacy and get over the...