This yellow, round pill imprinted with cor 188 is a alprazolam 1 MG 24 HR Extended Release Tablet, per the NIH.
ALPRAZOLAM EXTENDED-RELEASE is a human prescription drug. The active pharmaceutical ingredient is alprazolam and is classified as, "Benzodiazepine [EPC], Benzodiazepines [Chemical/Ingredient]."
This pill is made by a total of 5 firms: (1) Rising Pharmaceuticals Inc, (2) Rising Pharmaceuticals, Inc., (3) Preferred Pharmaceuticals, Inc, (4) H.J. Harkins Company, Inc., and (5) CorePharma, LLC.
There are 6 other yellow pills that with a similar imprint: "cor 188". They may be a different dosage of the same drug or a different drug entirely.