This green, round pill imprinted with LU G03 is a Lovastatin 40 MG Oral Tablet, per the NIH.
Lovastatin is a human prescription drug. The active pharmaceutical ingredient is lovastatin and is classified as, "HMG-CoA Reductase Inhibitor [EPC], Hydroxymethylglutaryl-CoA Reductase Inhibitors [MoA]."
This pill is made by a total of 7 firms: (1) Lupin Pharmaceuticals, Inc., (2) Lupin Pharmaceuticals, Inc, (3) Rebel Distributors Corp, (4) Physicians Total Care, Inc., (5) PD-Rx Pharmaceuticals, Inc., (6) REMEDYREPACK INC. , and (7) International Labs, Inc.
There are 2 other green pills that with a similar imprint: "LU G03". They may be a different dosage of the same drug or a different drug entirely.