Arnivas is a combination medicine used to treat heart failure. It reduces the risk of hospitalization and death due to long-lasting (chronic) heart failure. Arnivas can be taken with or without food but is best taken at the same time(s) each day. Swallow it as a whole with water. Your dose, and how often you take it, will be decided by your doctor and may change depending on how well you respond to the medicine. Keep taking the tablets regularly, as they have been prescribed, and try not to miss doses to get the most benefit. Do not stop taking them, even if you are feeling well. These tablets are preventing future harm. Some of the common side effects include cough, dizziness and feeling lightheaded. To reduce the risk of dizziness, try getting up slowly from a sitting or lying position. If these or other side effects are severe or do not go away, tell your doctor. Serious side effects are rare. Before taking this medicine, tell your doctor if you are taking any other medicines for blood pressure or heart conditions or if you have kidney or liver disease. Also let your doctor know all other medications you are using as they may affect, or be affected by, this medicine. This medicine should not be taken during pregnancy and is not recommended while breastfeeding. While using it your blood pressure will need to be checked often and your kidney function may also need to be tested.