Pill Identification by Imprints: 5964 Home Pill Identification by Imprints: 5964 1 result GUANFACINE HCL ER 4 MG TABLET Side 1: TEVA Color: White Side 2: 5964 Shape: Oval Other Popular Drug Imprint FPI PF M 522 L837 ZC 82 M RN2 BVF EP 138 S21 Z 12 P40 Tofranil-PM 100 mg MP 12 T127 PA 916 11 37 LCI POT 30 RD 53 44 291 422 L143 799 TL521 logo and 127 XM 54 650 MSD 275 509 NT 200 Z4 2.9 WC-003 K 70 NPR EC 375 P019 P E 10 3126 4165