This yellow, round pill imprinted with M 89 is a meloxicam 15 MG Oral Tablet, per the NIH.
Meloxicam is a human prescription drug. The active pharmaceutical ingredient is meloxicam and is classified as, "Cyclooxygenase Inhibitors [MoA], Nonsteroidal Anti-inflammatory Compounds [Chemical/Ingredient], Nonsteroidal Anti-inflammatory Drug [EPC]."
This pill is made by a total of 3 firms: (1) Mylan Pharmaceuticals Inc., (2) PD-Rx Pharmaceuticals, Inc., and (3) UDL Laboratories, Inc.
There are 6 other yellow pills that with a similar imprint: "M 89". They may be a different dosage of the same drug or a different drug entirely.