Conditions That Increase Serum Thyroid-Stimulating Hormone Values (cont.)
Therapy of hypothyroidism (3-6 weeks after beginning therapy [range, 1-8 weeks]; sometimes longer when pretherapy TSH is over 100 mU/ml); some patients
Acute psychiatric illness; few patients
Peripheral resistance to T4 syndrome; some patients
Antibodies (e.g., HAMA) interfering with monoclonal sandwich method of TSH assay
Telepaque (Iopanic acid) and Oragrafin (Ipodate) x-ray contrast media; some patients
Amphetamines; some patients
High altitudes; some patients