Dear Angie2193, Thank you for your clinical post. Lip augmentation with any products such as Juvederm can certainly be safe to undergo one day prior to a Brazilian butt lift. However, there is going to be a ventilation tube in all probability that is placed between your teeth. This can exert pressure on the lip, which may distort and deform or otherwise alter the lip shape that you’ve just enhanced with Juvederm. You can certainly discuss with the surgeon and anesthetist about your butt lift procedure and if it’s being performed under local anesthesia this won’t be an issue. If you are having an intubation or a tube placed down your throat you may want them to use a tooth block to ensure that the lips don’t get undo pressure from the tube. Alternatively, you could simply wait until after the Brazilian butt lift when this won’t be an issue. I hope this information is of some assistance and best of luck. To find out more, please visit the link below. R. Stephen Mulholland, M.D. Certified Plastic Surgeon Yorkville, Toronto