This green, round pill imprinted with JSP 561 is a Levothyroxine Sodium 0.088 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 6 firms: (1) Lannett Company, Inc., (2) Preferred Pharmaceuticals, Inc, (3) Rebel Distributors Corp, (4) Med-Health Pharma, LLC, (5) PD-Rx Pharmaceuticals, Inc., and (6) St Marys Medical Park Pharmacy
There is 1 other green pill that with a similar imprint: "JSP 561". They may be a different dosage of the same drug or a different drug entirely.