Concept:
OTC medicines are over-the-counter medicines that can be purchased without prescription.
Step 1: OTC medicines are used for minor and self-limiting ailments.
Step 2: They help patients manage simple conditions like cold, cough, acidity, or mild pain.
Step 3: This reduces unnecessary physician visits.
Step 4: Therefore, they reduce physician workload by managing minor ailments.
\[
\boxed{\text{Reduce physician workload by managing minor ailments}}
\]