Penicillin allergy is a lot less common than patients report. A low-risk history could allow you to prescribe it in the ED or clinic.
Adults with cough <3weeks or 3-8 weeks with post-tussive vomiting or whooping should be treated for pertussis; those with fever or without paroxysmal cough should be considered to have an alternate diagnosis. Children with <4 weeks of cough and post-tussive vomiting may have pertussis, but it was much less clear than in adults.
Although opioids are not first-line treatment for ankle sprains, an opioid was prescribed for 25% of emergency department patients diagnosed with an isolated ankle sprain. Prescribing varied widely among states. Additionally, patients prescribe greater quantities of opioids were more likely to transition to continued use.