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 ANAFRANIL 75 mg L554 ZC45 714 E 139 A D3 or PC RB97 CARAFATE TI 200 Q50 MYLAN DE 20 VIP 107 PREMARIN 0.45 L829 NOVAST 93 757 TARO CZ ER 100 G230 LOTREL 2255 339 3626 M B4 L 125 G 343 467 R179 SPI LES200 ALO300 M 355 NORPRAMIN 50 MYCOBUTIN 61 60 BRX 0.5 ZC 01 SUPRAX 200 BCL 25 299 AMBI 444 438