Pill Identification by Imprints: KEFLEX 500 mg Home Pill Identification by Imprints: KEFLEX 500 mg 1 result KEFLEX 500 MG CAPSULE Side 1: KEFLEX 500 mg Color: Light Green Side 2: Shape: Oblong Other Popular Drug Imprint K5 logo and 510 54 137 E 221 U47 G 325 N150 MYLAN 5100 N 344 E 25 WPI 844 L237 E 70 54 343 N 342 BMS 100 MCR 104 M 312 PH014 M 35 AZ E502 Prosteon INDERAL LA 80 P/T 268/40 L 51 nGL PRAVACHOL 40 2772 PB LCI 1329 54 628 logo and 54 RX 828 Andrx 640 742 CXL 4 TZ 7 T 18