This yellow, oval pill imprinted with L U D03 is a sertraline (as sertraline hydrochloride) 100 MG Oral Tablet, per the NIH.
Sertraline is a human prescription drug. The active pharmaceutical ingredient is sertraline hydrochloride and is classified as, "Serotonin Reuptake Inhibitor [EPC], Serotonin Uptake Inhibitors [MoA]."
This pill is made by a total of 3 firms: (1) LUPIN PHARMACEUTICALS INC, (2) Lupin Pharmaceuticals, Inc, and (3) Cardinal Health.
There are 2 other yellow pills that with a similar imprint: "L U D03". They may be a different dosage of the same drug or a different drug entirely.