Pill Identification by Imprints: S407 Home Pill Identification by Imprints: S407 1 result POTASSIUM CITRATE ER 10 MEQ TB Side 1: S407 Color: Pale Yellow Side 2: Shape: Oblong Other Popular Drug Imprint fentanyl 1200 mcg L272 P58 259 MUTUAL 866 n 356 ZC 82 54 650 54 892 LK100 54 452 TCL 016 KU 486 C 92 logo and 2918 CFZ W 50 PAR 823 CL 44 US 2.5 WPI 1118 b 777 TOZAL L 105 4468 MYLAN 3402 117 L 349 NL 950 782 159 MYLAN 7025 FE FORTE I 49 54 242 HP66 L837 ZYLOPRIM 100 93 782 93 321