Apparatus for reducing obstructive sleep apnea, snoring and/or nasal drainage. One apparatus includes an upper member fitting the interior and exterior surfaces of a users upper dentition, and a lower member fitting similarly adjacent a users lower dentition. The lower member includes eyeteeth extensions projecting away from the lower member. The upper member includes molar extensions projecting away from the upper member and toward the member molar regions so that when the user bites or clenches, the upper right and lower right extensions impinge on one another in substantially overlapping fashion, as do the upper left and lower left extensions. The upper and lower members have an anterior shape to form a gap sufficient for the users tongue to extend into the gap, and each molar extension may include a magnet. Methods of using the apparatus and kits to reduce sleep apnea, snoring, and/or nasal drainage.