This brown, oval pill imprinted with IG 258 is a nabumetone 750 MG Oral Tablet, per the NIH.
Nabumetone is a human prescription drug. The active pharmaceutical ingredient is nabumetone 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 12 firms: (1) Glenmark Generics Inc., USA, (2) Par Pharmaceutical Inc., (3) Preferred Pharmaceuticals, Inc, (4) Unit Dose Services, (5) H.J. Harkins Company, Inc., (6) Lake Erie Medical & Surgical Supply DBA Quality Care Products LLC, (7) Physicians Total Care, Inc., (8) NCS HealthCare of KY, Inc dba Vangard Labs, (9) Lake Erie Medical DBA Quality Care Products LLC, (10) Rebel Distributors Corp., (11) STAT Rx USA LLC, and (12) Bryant Ranch Prepack
There is 1 other brown pill that with a similar imprint: "IG 258". They may be a different dosage of the same drug or a different drug entirely.