What are the side effects of Heparin Lock Flush Solution?

In rare cases, Heparin Lock Flush Solution may cause a severe allergic reaction that leads to difficulty breathing, swelling in the face or throat, fever, and hives. If you develop these symptoms while having Heparin Lock Flush Solution administered, emergency medical assistance is warranted. Heparin Lock Flush Solution may increase your risk for uncontrolled bleeding. Tell your doctor right away if you develop unusual bruising, persistent nosebleeds, or bloody stools while using Heparin Lock Flush Solution. Other side effects may be possible, so talk to your doctor if any new or unusual symptoms develop during or after treatment with Heparin Lock Flush Solution.