Pill Identification by Imprints: NT6 Home Pill Identification by Imprints: NT6 1 result THEOPHYLLINE ER 600 MG TABLET Side 1: NT6 Color: White Side 2: Shape: Oblong Other Popular Drug Imprint NT 400 logo and 3061 logo and 33 41 E21 EP 904 ELP 20 K10 L 165 A05 1 923 MX 16 Syntho EP 130 SHIRE 381 L L or LU WPI 3660 Lifestar and logo M605 BI 11 ANAFRANIL 75 mg 838 OS 214 TI L2 or F ZZ TL 121 R 25 ZA48 AHI EV 0072 869 2 E 141 logo and 3117 MUTUAL 902 KU128 L 167 O23