Pill Identification by Imprints: M 437 Home Pill Identification by Imprints: M 437 3 results SPIRONOLACTONE 100 MG TABLET Side 1: M 437 Color: White Side 2: Shape: Round SPIRONOLACTONE 100 MG TABLET Side 1: M 437 Color: White Side 2: Shape: Round SPIRONOLACTONE 100 MG TABLET Side 1: M 437 Color: White Side 2: Shape: Round Other Popular Drug Imprint U7 or U13 logo and 2779 L 20 Lilly 3238 M 255 AA 820 M 134 A7 or A2 556 8118 TL 706 GP 151 M 76 AA250 AP4 IDT O 5 G455 FOSTEUM 52003 EP 117 K 13 54 751 H145 220 ALEVE SINUS&HEADACHE SZ 659 logo and LIBRAX ICN ACTIQ 400 P63 GG637 KU 107 UL 125 12 IP 46 AC356 M162 54 199 ML 4 W990 M R7 CLEOCIN 150 mg