Eantacid OS Syrup is a combination medicine used in the treatment of acidity, stomach ulcer, and heartburn. It helps in relieving the symptoms of acidity and ulcers such as stomach pain or irritation. It also neutralizes excessive acid in the stomach and helps in the easy passage of gas. Eantacid OS Syrup 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 constipation, nausea, vomiting, dizziness, insomnia, and allergic reaction. These are temporary and usually resolve with time. Contact your doctor straight away if you are at all concerned about any side effects. To overcome constipation, you should add fiber-rich foods in your diet and stay hydrated. It 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. Lifestyle modifications like having cold milk and avoiding hot tea, coffee, spicy food or chocolate can help you to get better results. 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 liver diseases so that your doctor can prescribe a suitable dose for you.