Problem
Your patient is Gerry, a 65-year-old with diabetes Type 2 who is recovering from a deep abrasion on their calf as a result of stepping on a branch while gardening. They are taking a prophylactic antibiotic Cephalexin 500mg BD which is due to be completed in 3 days. Gerry feels better and wants to stop taking the medication.
Explain to Gerry how this medication can prevent wound infection and why it is important to finish the course prescribed.