Mac S 1000mg Suspension is used in the treatment of ulcers in the stomach and intestine. It contains the active ingredient sucralfate which promotes the healing of ulcers by forming a coating over them which acts as a physical barrier. Mac S 1000mg Suspension is taken one hour before meals preferably at bedtime in the dose and duration advised by the doctor. 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. The most common side effect of Mac S 1000mg Suspension are constipation and headache. To prevent constipation, take plenty of fluids while on treatment with this medicine. Dizziness and sleepiness may occasionally occur, so do not drive or do anything that requires mental focus until you know how this medicine affects you. Before taking Mac S 1000mg Suspension inform the doctor if you are suffering from any liver or kidney disease. Let your doctor know about all other medications you are taking as some may affect, or be affected by this medicine. Do not take antacids within two hours of taking Mac S 1000mg Suspension.