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 logo and 833 3799 G 127 C 2 1/2 par 087 F 82 A 0.5 54 524 608 MYLAN 2045 044 93 5268 MERRELL 37 SL 50 TL521 logo and 40 FX100 Surfak 35 78 54 161 HP 1 PA 500 C HBP I83 6 0 APO T50 PLETAL 100 I 21 M 1850 L 232 54 024 Fentanyl 25 mcg/hr MP 20 AN 522 93/7441 I 64 Black B 749 logo 0023 I4 logo and 7