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 SZ 137 4211 V 346 6 036 R 1 59743 V S H119 L489 VH2 ALAVEN 10 799 GG 331 902 982 or 983 CL7 M 70 GX 623 natelle 1 MYLAN 1700 PAN 5 MYLAN 1101 A09 R333 Lactase M-3 Neurontin 100 mg CA AC 108 7.5 mg 7.5 mg E 129 VM RX615 533 N 40 54 735 93 311 15/500 PARAFON FORTE DSC MYLAN 3125