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 MYLAN 6203 GS TF5 BARRIER H 145 L123 E613 SZ 203 P 10 ABG 44 112 3.5 54 519 ANAFRANIL 25 mg 353 93 948 Z 5 G 90 L-FLAV HP 1 par 028 G72 705 2471 S 25 L498 ANI 230 5 XL AA 79 Kaopectate E5 or E6 DS or DP V357 CAP 3613 IL L 34 M L54 UL K 78 CDT 254 175