What is a round white pill with AN on top and 627 on the bottom on one side of the pill?

Generic Name: Tramadol
Strength: 50 mg
Manufacturer: Amneal Pharmaceuticals
Trade Name: N/A
Type: Analgesic
Class: RX
Size (mm): 9 (diameter)
Comment: Image courtesy of 4andsic. Reverse side is plain. Imprint AN627