Methodology
We searched PubMed and Google Scholar for eligible publications and
articles published before April, 2020 using the following search
strategy. We used one of the following terms: “thyroid function test”,
“thyroid assay”, “thyroid stimulating hormone”, “thyroxine”,
“tri-iodothyronine”, “thyroid binding globulin”, “thyroid binding
proteins” in combination with “drugs”, “medications”, “assay
interference”, “biotin”, “heparin”, “oral contraceptive pills ”,
“selective estrogen receptor modulators”, “estrogen”, “tamoxifen”,
“raloxifene”, “droloxifene”, “fluorouracil”, “clofibrate”,
“heroin”, “methadone”, “mitotane”, “nicotinic acid”,
“asparaginase”, “glucocorticoids”, “androgens”, “anabolic
steroids”, “l-asparaginase”, “salicylates”, “aspirin”,
“salsalate”, “non-steroidal anti-inflammatory drugs”, “frusemide”,
“phenytoin” and “carbamazepine”. References obtained from original
papers were also scrutinized and included wherever relevant to the
subject of this review.