Pill Identification by Imprints: BY4 Home Pill Identification by Imprints: BY4 15 results PRIMAQUINE 26.3 MG TABLET Side 1: BY4 Color: Purple Side 2: Shape: Round PRIMAQUINE 26.3 MG TABLET Side 1: BY4 Color: Purple Side 2: Shape: Round PRIMAQUINE 26.3 MG TABLET Side 1: BY4 Color: Purple Side 2: Shape: Round ‹ 1 2 › Other Popular Drug Imprint IMO A59 VALTREX 1 gram AUGMENTIN XR Z48 1311 WATSON 801 270 F51 M112 K 14 KU 260 WW 27 Watson 371 GS TF5 1704 ucb 500 253 04 LILLY 3251 A332 WELLBUTRIN XL 150 PA 916 EB 93 1003 ASL LU LU HZT U30 1122 MACRODANTIN 100 mg SANDOZ 620 Estroven 0475 3 7 logo and 152 MEL 7.5 logo and ZF FE1 395