Renvela 800mg Tablet is used to treat increased phosphate levels in the blood. It is used in patients who are on dialysis due to severe kidney disease. It inhibits the absorption of phosphate from the intestine and lowers the phosphate levels in the blood. Renvela 800mg Tablet should be taken with food. Take it in the dose and duration as advised by your doctor. Take it regularly and at a fixed time each day to get the maximum benefit of the medicine. Renvela 800mg Tablet may cause side effects such as nausea, vomiting, abdominal pain, constipation, and diarrhea. You may also develop low levels of calcium, folic acid, and vitamins A, D, E, and K in your blood. Take necessary supplements as advised by your doctor.