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 T29 RP 867 J67 54 339 M D10 A3 or F1 T81 VH4 44-502 NPS 550 L553 logo and 19 ALDACTAZIDE 25 54 036 H 104 MYLAN 5427 347 75 L235 LK 50 DAN 5554 US 20 221 P 450 ADALAT CC 295 WW 763 HYD 20 GG 124 SG 320 1MG IP 271 West-ward 202 ESL800 V353 UM A 38 MYLAN 8020 URS790 I 22