Pill Identification by Imprints: RX904 Home Pill Identification by Imprints: RX904 2 results VALACYCLOVIR HCL 500 MG TABLET Side 1: RX904 Color: Blue Side 2: Shape: Oblong VALACYCLOVIR HCL 500 MG TABLET Side 1: RX904 Color: Blue Side 2: Shape: Oblong Other Popular Drug Imprint TN 2 C 16 N006 MYLAN 5220 TRA650 EZ FE DCI BP 631 7154 E 41 AN 415 551 C5 or C2 ELN 30 5410 LCL CGPI ZA-36 VH3 HORIZON 205 44 546 M PD3 AC40 142 C170 21 S 660 WATSON 461 M 775 L 36 54 757 AA250 1111 P-O E 144 logo and 143 IP 145 G 24 NL 680 RE