This yellow, round pill imprinted with LUPIN 40 is a Lisinopril 40 MG Oral Tablet, per the NIH.
Lisinopril is a human prescription drug. The active pharmaceutical ingredient is lisinopril and is classified as, "Angiotensin Converting Enzyme Inhibitor [EPC], Angiotensin-converting Enzyme Inhibitors [MoA]."
This pill is made by a total of 5 firms: (1) Lupin Pharmaceuticals, Inc., (2) Blenheim Pharmacal, Inc., (3) Lake Erie Medical & Surgical Supply DBA Quality Care Products LLC, (4) International Labs, Inc., and (5) KAISER FOUNDATION HOSPITALS
There are 2 other yellow pills that with a similar imprint: "LUPIN 40". They may be a different dosage of the same drug or a different drug entirely.