Pill Identification by Imprints: R51 Home Pill Identification by Imprints: R51 2 results POTASSIUM CL ER 8 MEQ CAPSULE Side 1: LU Color: White Side 2: R51 Shape: Oblong POTASSIUM CL ER 8 MEQ CAPSULE Side 1: LU Color: White Side 2: R51 Shape: Oblong Other Popular Drug Imprint VP 012 logo and HC Z3 or P 258 R719 Z8 K 77 PRO n 356 5 VALIUM 500 500 110 u10 750 PROCARDIA XL 60 K 55 RX 900 18mg S191 ZA-36 Cdx 50 40 mg A3 CAR/RX 38 100 or 300 62 93/7439 E502 E 48 L553 ZESTRIL 2 1/2 LH1 logo and S5 ALEVE COLD&SINUS A 21 E 801 MYLAN 772 S551 L77