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 PA 916 Z 3927 CL 31 PRO X 77 PFIZER 411 H 502 PAL C 271 SG1002 U CRESTOR 20 259 or 310 AN 515 1G 317 GG 168 E4 509 1 RP KU 262 292 or 293 C56 1073 10/1000 S 370 S591 logo and 5 ENA AA 15 L008 MYLAN 5427 BMS 200 mg C 115 C45 L161 m5 CP 402 MYLAN 145 S 121 638