While holding a Pro-Nox mouthpiece to your mouth you then simply breathe in and out as directed by Dr. Delaney or Dr. Kridel.  The effects are normally felt within just a few breaths offering immediate relief of pain and anxiety without needles or pills.  This sensation wears off quickly after you start to breathe normally. Patients can select Pro-Nox at a small additional cost with submental liposuction surgery. If additional procedures are performed at the same time as submental liposuction and Pro-Nox is recommended by the surgeon, there is no additional charge.