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 AC ML 54 017 603 HP 27 IG274 P11 K 65 M 27 ACTIQ 400 OPI N2 V233 RU20 E 38 MX 16 44 628 logo and 047 MYLAN 810 S593 IP 253 ZC 16 M 177 5125 V MACRODANTIN 100 mg MYLAN 6320 PA83 TPV 250 FIORICET CODEINE WC 404 GX ES7 B106 P U M 1840 M T15 logo and 804 57 55 ML52 T1 150 T1 50