This red, oval pill imprinted with S6 is a Simvastatin 40 MG Oral Tablet, per the NIH.
simvastatin is a human prescription drug. The active pharmaceutical ingredient is simvastatin and is classified as, "HMG-CoA Reductase Inhibitor [EPC], Hydroxymethylglutaryl-CoA Reductase Inhibitors [MoA]."
This pill is made by a total of 9 firms: (1) Accord Healthcare Inc., (2) Preferred Pharmaceuticals, Inc, (3) REMEDYREPACK INC. , (4) Unit Dose Services, (5) H.J. Harkins Company, Inc., (6) St Marys Medical Park Pharmacy, (7) Rebel Distributors Corp, (8) Bryant Ranch Prepack, and (9) Lake Erie Medical DBA Quality Care Products LLC
There are 2 other red pills that with a similar imprint: "S6". They may be a different dosage of the same drug or a different drug entirely.