Mr. Stringfellow is a 65-year-old American Indian who has developed a cough that comes and goes. He has not sought treatment, and the cough has never truly subsided. About a month ago, Mr. Stringfellow felt bad and went to a walk-in clinic. After an evaluation, the healthcare provider (HCP) prescribed a macrolide, azithromycin (Zithromax) and suggests an over the counter (OCT) cough medication.