How Long After Changing Thyroid Medication Should TSH Be Rechecked? Written by Dr. Albana Greca, Family Physician For most adults taking levothyroxine for hypothyroidism, TSH is usually rechecked about 6 to 8 weeks after starting treatment or changing the dose. Testing much earlier can be misleading because levothyroxine has a long half-life and the pituitary-thyroid […]
