What are the risks of hyaluronidase?

Hyaluronidase is officially approved by the FDA to improve the dispersion and absorption of other drugs, such as anesthetic agents. The use of hyaluronidase to reverse hyaluronic acid fillers such as Restylane, Juvederm, or Perlane, while safe and effective, is not officially approved by the FDA and thus is considered an off-labelled indication. Ideally, allergy testing should be performed along an inner forearm area and observed for 24-48 hours to minimize risk of very unlikely chance of allergic reaction.

The use of hyaluronidase to dissolve hyaluronic acid dermal fillers is very effective and safe. Although its use in this manner is not FDA-approved, this off-label use is very acceptable and beneficial. In fact, using HA dermal fillers anywhere besides the laugh lines (nasolabial folds) is also considered off-label but considered a standard of practice. We know of no adverse events as those suggested in the question.

Hyaluronidase can rapidly reverse the effects of hyaluronic acid fillers. It is a very safe product and I have been using it for 15 years. I also use hyaluronidase for dispersing the effects of local anesthesia when I do eyelid surgery and it works very well. When used in small doses, it can quickly within 24-48 hours reverse the effect of the most common fillers such as Restylane and Juvederm. It has no visible effects itself and when the filler is gone, the net result will be a return to the pre-filler correction state. In even smaller amounts you can dissolve some of the excess filler while maintaining the correction; however, that is not always possible. I hope that information helps.