Pill Identification by Imprints: RX 504 Home Pill Identification by Imprints: RX 504 0 results Nothing Found!!! Other Popular Drug Imprint M450 862 Lilly 3227 1326 logo and TI logo SANDOZ 664 WATSON 528 93/7439 U 136 M525 H10/325 E224 E5 or E6 420 93 3145 144 MP 658 GG N7 LANNETT M 407 WATSON 780 G451 ZBN PLIVA 325 AL 21 H23 logo and 97 4186 8 08 Benadryl L476 K GP E4416 HYD 100 G 021 WATSON 583 MYLAN 7170 1113 121