Since Renacidin is given through a catheter, it's important to keep your catheter and the surrounding area clean and dry to prevent infections. Check with your provider if you have questions about how to take care of your catheter at home. If the skin around the catheter is red, painful, feels hard, or if there's pus, let your provider know right away. These could be signs and symptoms of an infection. In addition, always make sure your catheter or tube isn't blocked by any calcium crystals that might be in the urine while using Renacidin. During treatment with Renacidin, your provider will also routinely perform blood and urine tests to make sure this medication is safe for you. Blood tests help track any changes in certain electrolyte or protein levels in the blood, and urine tests can help identify possible infections early.