This yellow, round pill imprinted with L 25 M is a Lisinopril 20 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) Mylan Institutional Inc., (2) Mylan Pharmaceuticals Inc., (3) McKesson Contract Packaging, (4) State of Florida DOH Central Pharmacy, and (5) Cardinal Health
There are 6 other yellow pills that with a similar imprint: "L 25 M". They may be a different dosage of the same drug or a different drug entirely.