title: Causes of high free-thyroxine index values in sick euthyroid elderly patients.
abstract: Modest elevation of the free-thyroxine index occurs in many apparently euthyroid elderly in-patients. The present study investigated the possible relevance of drug side-effects to this problem. It appears that such side-effects associated with the use of L-Dopa, digoxin and co-trimoxazole account for a substantial proportion of the observed elevated free-thyroxine index results.
mesh_terms: D001281:Atrial Fibrillation / Q000097:blood; D004071:Digitalis Glycosides / Q000009:adverse effects; D004194:Disease; D004232:Diuretics / Q000009:adverse effects; D064420:Drug-Related Side Effects and Adverse Reactions; D006333:Heart Failure / Q000097:blood; D006801:Humans; D007980:Levodopa / Q000009:adverse effects; D013961:Thyroid Gland / Q000502:physiology; D013974:Thyroxine / Q000097:blood*
chemical_list: D004071:Digitalis Glycosides; D004232:Diuretics; D007980:Levodopa; D013974:Thyroxine