Maria de Jesus Samudio-de Alonso appeals her jury convictions for importing into the United States, and possessing with intent to distribute, cocaine. She argues pursuant to Apprendi v. New Jersey, 530 U.S. 466, 120 S.Ct. 2348, 147 L.Ed.2d 435 (2000), that (1) a defendant’s knowledge of drug type and drug quantity are *643 material elements of the offense of conviction which must be proven beyond a reasonable doubt to a jury and, therefore, the evidence was insufficient to support her convictions and (2) 21 U.S.C. § 841 is facially unconstitutional.

She correctly concedes that these issues are foreclosed by United States v. Gamez-Gonzalez, 319 F.3d 695, 700 (5th Cir. 2003), and United States v. Slaughter, 238 F.3d 580, 582 (5th Cir. 2000), respectively, and she raises them only to preserve their further review by the Supreme Court. We are bound by our precedent absent an intervening Supreme Court decision or a subsequent en banc decision. See United States v. Short, 181 F.3d 620, 624 (5th Cir. 1999).

AFFIRMED.