Pill Identification by Imprints: N T4 Home Pill Identification by Imprints: N T4 1 result THEOPHYLLINE ER 400 MG TABLET Side 1: N T4 Color: White Side 2: Shape: Round Other Popular Drug Imprint 553 PE 723 logo and 57 MCR 109 L021 A176 ROBAXIN 750 567 ZF 15 PAD GG 97 S 5 A/P 25 / 30 L 202 31 033 L177 E 720 MRK TL 175 S 430 ENA WPI 867 MSD 735 L133 011 L469 CI barr 180 mg 667 Ris 0.5 PARLODEL 5 mg ML 67 A 153 RDY 665 EXELON 4.5 mg AV1 or AV2 Nitroglycerin 0.2 mg/hr I-2 H23