Final answer:
Macrolides are a class of antibiotics that can be prescribed to increase gastrointestinal motility.
Step-by-step explanation:
In some cases, antibiotics may be prescribed specifically for their effects on increasing gastrointestinal (GI) motility. A class of antibiotics called macrolides, which includes clarithromycin, can have prokinetic effects on the GI tract. These medications work by increasing the contractions of the smooth muscles in the stomach and intestines, thereby improving the movement of food through the digestive system.