Do not use if you have severe allergies with a history of severe reactions (anaphylaxis), are allergic to lidocaine or gram-positive bacterial proteins used to make hyaluronic acid, prone to bleeding, or have a bleeding disorder.

The safety of use while pregnant or breastfeeding has not been studied. Talk to your Injector if you have a history of scarring or pigmentation disorders, as these side effects can occur with hyaluronic acid fillers. Tell your doctor if you are planning other cosmetic treatments (i.e., lasers and chemical peels) as there is a possible risk of inflammation at the injection site.

Do not use if you're taking medications that lower your body's immune response or affect bleeding, such as aspirin or warfarin, as these medications may increase the risk of bruising or bleeding at the gel injection site. Using these products on gel injection sites with skin sores, pimples, rashes, hives, cysts, or infections should be postponed until healing is complete.

The most common side effects are swelling, redness, pain, bruising, headache, tenderness, lump formation, itching at the injection site, and impaired hand function. Serious but rare side effects include delayed onset infections, recurrence of herpetic eruptions, and superficial necrosis at the injection site. The risk of unintentional injection into a blood vessel is small but can occur and could result in serious complications, which may be permanent including, vision abnormalities, blindness, stroke, temporary scabs, or permanent scarring of the skin. As with all skin injection procedures, there is a risk of infection.