Orlander Craze Johnson appeals his conviction, following a jury trial, for conspira *336 cy to possess with intent to distribute 50 grams or more of cocaine base. He first asserts that the evidence was insufficient to support his conviction because the Government’s case relied primarily on the testimony of a coconspirator, which he contends was unreliable and unsubstantiated. The testimony of various Government witnesses, including the cooperating coconspirator, was sufficient to support the conspiracy conviction because the testimony established the existence of an agreement between two or more persons to violate narcotics laws, Johnson’s knowledge of such agreement, and his voluntary participation in it. See United States v. Peters, 283 F.3d 300, 307 (5th Cir. 2002); United States v. Westbrook, 119 F.3d 1176, 1189 (5th Cir. 1997).

Johnson avers that the district court should have excluded, under Fed.R.Evtd. 404(b), the evidence of extraneous drug transactions. The district court’s evidentiary ruling with respect to Johnson’s extraneous drug transactions was in accord with Rule 404(b), which provides that extrinsic evidence of other crimes, wrongs, or acts is not admissible to prove the character of a person to show action in conformity therewith, but is admissible for other purposes, such as intent. See Fed.R.Evid. 404(b); United States v. Beechmn, 582 F.2d 898, 911 (5th Cir. 1978) (en banc). Also, the district court diminished the prejudicial effect of the Rule 404(b) evidence by giving a limiting instruction to the jury regarding the proper use of the evidence. United States v. Taylor, 210 F.3d 311, 318 (5th Cir. 2000). The district court therefore did not abuse its discretion with reference to the challenged evidentiary ruling. United States v. Buchanan, 70

F.3d 818, 831 (5th Cir. 1995). The judgment of the district court is AFFIRMED.