Pill Identification by Imprints: S406 Home Pill Identification by Imprints: S406 1 result POTASSIUM CITRATE ER 5 MEQ TAB Side 1: S406 Color: Pale Yellow Side 2: Shape: Round Other Popular Drug Imprint U36 GG 55 SANKYO ACN 4 BL 301 C1 or C2 or C3 or P MYLAN 183 E227 ND1 ETO 200 MG 22.5 mg 702 S 5 M 84 Z3 or P RAPAMUNE 0.5 mg CL 83 Lilly 3229 EP 116 ZE 71 MMD H569 137 WATSON 347 C 35 HP 26 Lilly 1 2 cor 216 HP 61 E448 C P R136 115 54 620 O E logo and 34 H 008 MUTUAL 401