Gerdnil 30 is a medicine that reduces the amount of acid produced in your stomach. It is used for treating acid-related diseases of the stomach and intestine such as heartburn, acid reflux, peptic ulcer disease, and some other stomach conditions associated with excessive acid production. Gerdnil 30 is also used to prevent stomach ulcers and acidity that may be seen with the prolonged use of pain-killers. It belongs to a class of medicines known as proton pump inhibitors (PPIs). This medicine should be taken one hour before a meal, preferably in the morning. The dose will depend on your underlying condition and how you respond to the medicine.