Explanation:
Antacid
Indigestion can lead to a feeling of fullness, burping, heartburn (due to gastric acid reflux), etc. Thus an antacid can neutralize the effect of an excess of acid and hence it can be consumed for some relief from heartburn, indigestion, acidity, etc.
Antibiotics are taken in case of bacterial infections, Analgesic act as painkillers, Antiseptic is to prevent sepsis.