Pill Identification by Imprints: R52 Home Pill Identification by Imprints: R52 2 results POTASSIUM CL ER 10 MEQ CAPSULE Side 1: LU Color: Blue Side 2: R52 Shape: Oblong POTASSIUM CL ER 10 MEQ CAPSULE Side 1: LU Color: Blue Side 2: R52 Shape: Oblong Other Popular Drug Imprint E 152 66 R-263 CL51 NL 571 1462 beano par 727 EP 127 AHI STO 125 RX 773 Andrx 699 CP 402 IP 110 E550 44 404 475 50 mg 57 55 GG851 X592 A533 U-S 125 8 08 U39 2775 607 PA46 BMS 1967 UM T500 UCY 500 1326 logo and 661 ZD 16 54 466 L272 K 18 38