Individual tests

Free T4 is the active form of the thyroxine hormone that enters your tissues where needed. Your thyroid, which controls how your body uses energy, produces thyroxine. These hormones affect your weight, heart, body temperature, muscle strength, and mood. A T4 test checks how well your thyroid is working.
Morphine is a substance that has analgesic properties but also causes sedation, euphoria, respiratory depression, and orthostatic hypotension. Chronic use can lead to tolerance and dependence. Clinical monitoring of compliance or illegal use measures these analytes.
T3 is one of two major hormones made by your thyroid, a small gland located near the throat. It helps regulate your energy use, weight, body temperature, muscle strength, and nervous system. This test helps diagnose, assess and monitor thyroid disorders, such as an overactive or underactive thyroid gland and aids diagnoses of pituitary gland disorders.
Thyroxine (T4) is a thyroid hormone affecting your weight, heart, body temperature, and muscle strength. A T4 test can check how well your thyroid is working. It also helps diagnose and monitor thyroid disease and conditions like an underactive or overactive thyroid.
Thyroglobulin is a thyroid protein. This test is mostly used to monitor, but not to diagnose, patients with well-differentiated thyroid cancers. The measurement of thyroglobulin after thyroidectomy and ablation of the thyroid gland is useful for determining metastasis. It may also help diagnose hyperthyroidism and hypothyroidism, which are common non-cancer thyroid conditions.
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