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 UCB 500XR M F4 M 23 logo and 658 logo and LANNETT WP 128 ZC57 IP 218 PRA 80 PX NL C NA 500 4442 311 AV A 48 A 153 253 or 306 TCL 334 ND2 93 3002 MP 772 CARDURA logo and 81 440 ASK001 IG L413 M 615 PREMPRO 0.3/1.5 93 658 190 421 BP 631 RESTORIL 15 mg RESTORIL 15 mg S77 VANDA 20 MG 54 351 RE 24 N 77