Pill Identification by Imprints: A538 Home Pill Identification by Imprints: A538 2 results GUANFACINE HCL ER 4 MG TABLET Side 1: A538 Color: Blue Side 2: 4 mg Shape: Oblong GUANFACINE HCL ER 4 MG TABLET Side 1: A538 Color: Blue Side 2: 4 mg Shape: Oblong Other Popular Drug Imprint L484 M P8 RI2 C28 L U 54 293 cor 150 44 111 VP 044 M 1745 G 2001 GG 737 167 207 MYLAN TM 250 Lopid IP 102 C171 5513 logo and 050 par 222 216 PY 2 SZ 137 13 DAN DAN LP332 G-DS-50 NE 200 M 127 ORAP 1 AHI 2 1310 E 5000 M EN3 M BU1 ZD 21 C82 NEORAL 25mg L498