Pill Identification by Imprints: P21 Home Pill Identification by Imprints: P21 4 results LOSARTAN POTASSIUM 25 MG TAB Side 1: LU Color: White Side 2: P21 Shape: Oblong LOSARTAN POTASSIUM 25 MG TAB Side 1: LU Color: White Side 2: P21 Shape: Oblong LOSARTAN POTASSIUM 25 MG TAB Side 1: LU Color: White Side 2: P21 Shape: Oblong LOSARTAN POTASSIUM 25 MG TAB Side 1: LU Color: White Side 2: P21 Shape: Oblong Other Popular Drug Imprint MP 47 #L 001 BI 6 F L RTG 50 WRF 7 1/2 90 T Ortho or Ortho 135 logo and 144 A 75 ZA-44 U VP 044 Prenate 2172 RX 553 48 11 L994 1206 WRF 10 logo and 3059 C 94 NP 1 701 N008 5 or 10 CL 20 TH2M GLD M 61 L058 CH75 ZC42 P4 SLV P L FC 119 MP 512 WATSON 384 or WATSON MP 35