Zanfast Oral Suspension Saunf Sugar Free is a prescription medicine that is used in the treatment of acidity, stomach ulcer and bloating. It helps in relieving the symptoms of acidity and ulcers such as nausea, stomach pain or irritation. It also neutralizes excessive acid in the stomach and helps in easy passage of gas. Zanfast Oral Suspension Saunf Sugar Free is taken without food in a dose and duration as advised by the doctor. The dose you are given will depend on your condition and how you respond to the medicine. You should keep taking this medicine for as long as your doctor recommends. If you stop treatment too early your symptoms may come back and your condition may worsen. Let your healthcare team know about all other medications you are taking as some may affect, or be affected by this medicine. Do not take it for more than the recommended duration as long-term administration may have harmful effects on the health.The most common side effects are chalky taste, dryness in mouth, diarrhea, and constipation. Most of these are temporary and usually resolve with time. Contact your doctor straight away if you are at all concerned about any of these side effects. To overcome constipation, you should add fiber-rich foods in your diet and stay hydrated. This medicine may also cause dizziness and sleepiness, so do not drive or do anything that requires mental focus until you know how this medicine affects you. Avoid drinking alcohol while taking this medicine as it can worsen your sleepiness.Before taking this medicine, you should tell your doctor if you are pregnant, planning pregnancy or breastfeeding. You should also tell your doctor if you have any kidney or liver diseases so that your doctor can prescribe a suitable dose for you.