This purple, oval pill imprinted with 175 GG 339 is a Levothyroxine Sodium 0.175 MG Oral Tablet, per the NIH.
Levothyroxine sodium is a human prescription drug. The active pharmaceutical ingredient is levothyroxine sodium and is classified as, "l-Thyroxine [EPC], Thyroxine [Chemical/Ingredient]."
This pill is made by a total of 2 firms: (1) Sandoz Inc, and (2) REMEDYREPACK INC. .
There is 1 other purple pill that with a similar imprint: "175 GG 339". They may be a different dosage of the same drug or a different drug entirely.