Pill Identification by Imprints: A221 Home Pill Identification by Imprints: A221 2 results TRAMADOL ER 100 MG TABLET Side 1: A221 Color: White Side 2: Shape: Round TRAMADOL ER 100 MG TABLET Side 1: A221 Color: White Side 2: Shape: Round Other Popular Drug Imprint PD 158 V362 U39 K 13 MP 88 A 640 L181 P294 fentanyl 800 mcg UNISOM M D11 G-X-U PA140 L190 K 55 GGN5 logo and 4357 logo and NK PE820 AP205 Andrx 640 AMBI 409 Nitroglycerin 0.4 mg/hr PRE 01 par 289 AN 642 L149 M C53 MP 46 NV4 A3 or F1 PFIZER 412 EP 320 Q 300 4 0 DAN 5642 8I E 512 CHEMET 51