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Synthroid Information Center

By Mary Shomon, About.com

Updated: June 19, 2006

About.com Health's Disease and Condition content is reviewed by our Medical Review Board

  • June 4, 2001 -- Press Release: American Thyroid Association, The Endocrine Society, and ThyCa Call for Continued Availability of Thyroid Hormone Products
    The American Thyroid Association, The Endocrine Society, and ThyCa: Thyroid Cancer Survivors' Association are urging that the Food and Drug Administration (FDA) maintain the uninterrupted availability of Synthroid and other currently marketed thyroid hormone (thyroxine) products to the 13 million U.S. patients who rely on them every day for life to treat hypothyroidism, thyroid cancer, and other thyroid conditions.
  • June 1, 2001 -- Abbott Response to News Reports on Synthroid
    Abbott's press release indicating that it will be submitting a New Drug Application for Synthroid.
  • June 1, 2001 -- Press Release: Synthroid Should Remain on the Market, Says the American Association of Clinical Endocrinologists
    The American Association of Clinical Endocrinologists issues press release objecting to the recommendation from the National Organization of Women (NOW) and the Gray Panthers that the Food and Drug Administration (FDA) withdraw Synthroid from the market.
  • June 1, 2001 -- Gray Panthers Challenge Abbott Labs and American Thyroid Association To Answer FDA Concerns Regarding Safety and Effectiveness of Synthroid
    The Gray Panthers sent a letter to Abbott asking the company to respond to FDA concerns regarding the safety and effectiveness of Synthroid, concluding: "Unless we receive satisfactory answers to the questions posed in this letter, we believe your product should be removed from the market."
  • May 25, 2001 -- Levoxyl Receives FDA Approval
    The FDA has issued its approval for Levoxyl, manufactured by King. Now, thyroid patients have two FDA-approved levothyroxine drugs, at two very different prices and availabilities, to choose from. In the meantime, the top-selling levothyroxine drug, Synthroid, has still not filed for or received FDA approval.
  • May 14, 2001 -- National Organization of Women, Gray Panthers, and Stop Patient Abuse Now to Take Action Against Pharmaceutical Market Abuses
    Group threatens class action suit against Synthroid if the drug is not withdrawn from market. The strategy is intended to raise the financial stakes for drug manufacturers that engage in anti-competitive or anti-consumer behavior in order to avoid competition.
  • May 1, 2001 -- Press Release: Unithroid(TM) the Only NDA-Approved Levothyroxine Sodium Approved as Safe And Effective by the FDA, Having Demonstrated Stability, Consistent Potency, And Dose Proportionality
    Watson press release discussing Unithroid's status as only approved levothyroxine drug.
  • May, 2001 -- Synthroid Has a Long History of Problems, Says FDA, in Denial Letter
    In a scathing letter to Knoll Pharmaceuticals, the FDA has officially denied their request for various approvals to bypass new drug application, illustrating how the top-selling thyroid drug has not been reliably potent and stable for years.
  • April, 2001 -- Abbott Laboratories to Submit New Drug Application for Synthroid
    After failing to bypass the new drug application (NDA) process by applying for "Generally Recognized as Safe and Effective Status," Synthroid's manufacturer is forced to apply for an NDA in order to remain available on the market after August, 2001.
  • April, 2001 -- What is the "Best" Thyroid Drug?
    Is it Synthroid, Unithroid, Armour, Thyrolar, Cytomel, or something else? The answer might surprise you.
  • March, 2001 -- What is Synthroid Hiding?
    If Synthroid is safe and effective, why won't it apply for FDA approval like its competitors? The clock is ticking, and as the deadline approaches, rather than applying for FDA approval, Synthroid's manufacturers seem more preoccuped with sending marketing to doctors and pharmacists...See the actual letter they are distributing, and find out what questions YOU should be asking.
  • February, 2001 -- Synthroid Still Lacks Approval Necessary to Remain Legally on the Market After August 14, 2001
    Without an approved new drug application from the FDA, or a change in status, Synthroid will not longer be legal to sell after August 14, 2001. What thyroid drugs ARE approved by the FDA at present, and what will happen in August if Synthroid is NOT approved?
  • February, 2001 -- Unithroid Update: Where Can You Get Unithroid, and When?
    Unithroid is still the only FDA-approved levothyroxine product. But can you get a prescription filled easily? And if so, where can you get it?
  • December, 2000 -- Synthroid to Get New Manufacturer
    Knoll Pharmaceutical, manufacturer of Synthroid, to be sold to Abbott Laboratories.
  • December, 2000 -- FDA Orders Recall of Synthroid
    Product samples given to doctors are mislabeled, and patients may be receiving 100 mcg pills labeled as 200 mcg. Find out if you have any of the mislabeled product!
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