Do not administer to patients with known hypersensitivity (allergy) to hyaluronic acid and/or other ingredients in the product. Do not use with other products containing quaternary ammonium salts such as benzalkonium chloride. In some cases, it may cause temporary eye pain or irritation, hyperemia or redness of the eye, mild itching or burning, as well as watery eyes, blurred vision and/or a feeling of having foreign bodies in the eye. Please consult your doctor regarding the use of this product by children, pregnant women, or during breastfeeding.