Information, Symptoms, Treatments and Resources

Abt4552zSynthroid 50 mcg Tab
Abt9296zSynthroid 112 mcg Tab
Abt7149zSynthroid 300 mcg Tab
Myn18070levothyroxine 88 mcg Tab
Myn18150levothyroxine 150 mcg Tab
Dni11110Levoxyl 150 mcg Tab
Wts09050levothyroxine 88 mcg Tab
Lan13770levothyroxine 150 mcg Tab
For03230Levothroid 100 mcg Tab
For13220Levothroid 75 mcg Tab
For13240Levothroid 125 mcg Tab
For13280Levothroid 300 mcg Tab
Sdz51800levothyroxine 25 mcg Tab
Sdz51860levothyroxine 125 mcg Tab
Sdz51890levothyroxine 200 mcg Tab
For13310Levothroid 137 mcg Tab
Wts09070Unithroid 112 mcg Tab
Wts09100Unithroid 175 mcg Tab
Lan13800Unithroid 300 mcg Tab
Lan16380levothyroxine 137 mcg Tab
Akr04980Tirosint 137 mcg Cap
Akr04920Tirosint 50 mcg Cap
Kno11000Synthroid 175 mcg Tab
Dni11320Levoxyl 88 mcg Tab
Dni11200Levoxyl 125 mcg Tab
Abt5182zSynthroid 75 mcg Tab
Abt7068zSynthroid 125 mcg Tab
Myn18000levothyroxine 25 mcg Tab
Myn18090levothyroxine 100 mcg Tab
Myn18170levothyroxine 175 mcg Tab
Wts09020levothyroxine 25 mcg Tab
Jsp05160levothyroxine 100 mcg Tab
Wts09100levothyroxine 175 mcg Tab
For03260Levothroid 175 mcg Tab
For13290Levothroid 88 mcg Tab
For13250Levothroid 150 mcg Tab
For03240Levothroid 125 mcg Tab
Sdz51810levothyroxine 50 mcg Tab
Sdz51910levothyroxine 137 mcg Tab
Sdz51900levothyroxine 300 mcg Tab
Lan13770Unithroid 150 mcg Tab
Wts09080Unithroid 125 mcg Tab
Wts09030Unithroid 50 mcg Tab
Myn18230levothyroxine 137 mcg Tab
Akr04950Tirosint 100 mcg Cap
Akr04990Tirosint 150 mcg Cap
Akr04930Tirosint 75 mcg Cap
Dni11300Levoxyl 112 mcg Tab
Dni11100Levoxyl 100 mcg Tab
Abt37270Synthroid 137 mcg Tab
Abt6594zSynthroid 88 mcg Tab
Abt7069zSynthroid 150 mcg Tab
Myn1803zlevothyroxine 50 mcg Tab
Myn18110levothyroxine 112 mcg Tab
Myn18190levothyroxine 200 mcg Tab
Wts09030levothyroxine 50 mcg Tab
Wts09070levothyroxine 112 mcg Tab
Wts09110levothyroxine 200 mcg Tab
For13200Levothroid 25 mcg Tab
For13230Levothroid 100 mcg Tab
For13260Levothroid 175 mcg Tab
For03250Levothroid 150 mcg Tab
Sdz51840levothyroxine 100 mcg Tab
Sdz51870levothyroxine 150 mcg Tab
Sdz51820levothyroxine 75 mcg Tab
Jsp05160Unithroid 100 mcg Tab
Wts09110Unithroid 200 mcg Tab
Jsp05150Unithroid 75 mcg Tab
Dni11350Levoxyl 137 mcg Tab
Akr04960Tirosint 112 mcg Cap
Akr04900Tirosint 13 mcg Cap
Akr04940Tirosint 88 mcg Cap
Dni11170Levoxyl 25 mcg Tab
Dni11190Levoxyl 75 mcg Tab
Abt7148zSynthroid 200 mcg Tab
Abt6624zSynthroid 100 mcg Tab
Abt7070zSynthroid 175 mcg Tab
Myn18050levothyroxine 75 mcg Tab
Myn18130levothyroxine 125 mcg Tab
Myn18210levothyroxine 300 mcg Tab
Jsp05150levothyroxine 75 mcg Tab
Wts09080levothyroxine 125 mcg Tab
Jsp05230levothyroxine 300 mcg Tab
For13210Levothroid 50 mcg Tab
For13300Levothroid 112 mcg Tab
For13270Levothroid 200 mcg Tab
For03220Levothroid 75 mcg Tab
Sdz51850levothyroxine 112 mcg Tab
Sdz51880levothyroxine 175 mcg Tab
Sdz51881levothyroxine 88 mcg Tab
Wts09020Unithroid 25 mcg Tab
Wts09050Unithroid 88 mcg Tab
Wts09080levothyroxine 150 mcg Tab
Dni11220Levoxyl 175 mcg Tab
Akr04970Tirosint 125 mcg Cap
Akr00910Tirosint 25 mcg Cap


Levothyroxine is used to treat an underactive thyroid (hypothyroidism). It replaces or provides more thyroid hormone, which is normally produced by the thyroid gland. Low thyroid hormone levels can occur naturally or when the thyroid gland is injured by radiation/medications or removed by surgery. Having enough thyroid hormone is important for maintaining normal mental and physical activity. In children, having enough thyroid hormone is important for normal mental and physical development. This medication is also used to treat other types of thyroid disorders (such as certain types of goiters, thyroid cancer). This medication should not be used to treat infertility unless it is caused by low thyroid hormone levels.

Side Effects

Hair loss may occur during the first few months of treatment. This effect is usually temporary as your body adjusts to this medication. If this effect persists or worsens, tell your doctor or pharmacist promptly. Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor immediately if any of these unlikely but serious effects of high thyroid hormone levels occur: increased sweating, sensitivity to heat, mental/mood changes (such as nervousness, mood swings), tiredness, diarrhea, shaking (tremor), headache, shortness of breath. Get medical help right away if any of these rare but serious effects of high thyroid hormone levels occur: chest pain, fast/pounding/irregular heartbeat, swelling hands/ankles/feet, seizures. A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
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This is a summary and does NOT have all possible information about this product. This information does not assure that this product is safe, effective, or appropriate for you. This information is not individual medical advice and does not substitute for the advice of your health care professional. Always ask your health care professional for complete information about this product and your specific health needs.
The information contained in the First DataBank databases is intended to supplement the knowledge of physicians, pharmacists, and other healthcare professionals regarding drug therapy problems and patient counselling information. This information is advisory only and is not intended to replace sound clinical judgment in the delivery of healthcare services. First DataBank disclaims all warranties, whether expressed or implied, including any warranty as to the quality, accuracy, and suitability of this information for any purpose.