Pill Identification by Imprints: ATN 50 Home Pill Identification by Imprints: ATN 50 2 results ATENOLOL 50 MG TABLET Side 1: ATN 50 Color: White Side 2: Shape: Round ATENOLOL 50 MG TABLET Side 1: ATN 50 Color: White Side 2: Shape: Round Other Popular Drug Imprint F52 BENTYL 20 WATSON 407 L498 L78 K 44 8118 P50 T582 L41 4942 MYLAN 4010 SL 456 Fentanyl 100 mcg/hr fentanyl 600 mcg OXC 150 TL 709 B855 3609 HP 229 P58 671 T 17 12.5 U28 STO 125 W Effexor XR 52H 52H 53 logo and 342 44 403 Z 4235 U 34 AMBI 448 SE 5 AN057 ALTACE 1.25 mg PBT BNP 7600 SZ 787