Levothyroxine 112mcg
Generic For: Synthroid
Levothyroxine 112mcg (Synthroid) is a synthetic thyroid hormone used to treat hypothyroidism, a condition in which the thyroid gland does not produce enough hormone. It is also used to manage certain types of goiter and as part of therapy for thyroid cancer. After a licensed provider reviews your prescription, your medication ships from a licensed U.S. pharmacy.
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90-day supply · $0.28/tablet
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Buy Levothyroxine 112mcg Online
A thyroid hormone replacement for hypothyroidism and thyroid hormone deficiency
Levothyroxine 112mcg Quick Facts
| Drug class | Thyroid hormone replacement |
|---|---|
| Treats | Hypothyroidism, goiter, thyroid cancer (adjunct), TSH suppression |
| Form | Tablet |
| Typical dosing | Take 1 tablet by mouth daily in the morning. |
| Prescription required | Yes — prescription only |
What Is Levothyroxine 112mcg?
Levothyroxine is a man-made version of thyroxine (T4), the hormone your thyroid gland normally produces. When the thyroid is underactive, levothyroxine restores hormone levels to help regulate energy, metabolism, and body temperature. The 112mcg tablet is one of several strengths, and your provider selects the dose based on lab results and your response. It is typically taken once daily on an empty stomach and is often a long-term or lifelong treatment.
What Does Levothyroxine 112mcg Treat?
Primary hypothyroidism
Secondary (pituitary) hypothyroidism
Tertiary (hypothalamic) hypothyroidism
Congenital hypothyroidism
Pituitary TSH suppression in thyroid cancer (adjunct)
Euthyroid goiter management
Levothyroxine 112mcg Dosage
Adults with primary hypothyroidism: approximately 1.6 mcg/kg by mouth once daily on an empty stomach, 30–60 minutes before breakfast.
Dose is individualized and adjusted every 4–6 weeks based on TSH levels.
Take with water; separate from calcium, iron, and antacids by at least 4 hours.
Your prescriber will determine the dose and duration that are right for you. Always follow the directions on your prescription label.
Levothyroxine 112mcg Side Effects
Common side effects
- Hair thinning (usually temporary)
- Headache
- Nervousness or irritability
- Trouble sleeping
- Increased sweating
- Changes in appetite or weight
- Diarrhea
- Menstrual changes
Serious side effects
Stop taking this medication and seek medical attention right away if you experience:
- Chest pain or irregular heartbeat
- Rapid or pounding heartbeat (palpitations)
- Shortness of breath
- Signs of allergic reaction (rash, swelling, difficulty breathing)
- Seizures
- Symptoms of too much thyroid hormone (tremor, heat intolerance, significant weight loss)
Warnings & Interactions
Not for weight loss; large doses can cause serious or life-threatening effects
Use caution with heart disease; may worsen angina or arrhythmias
Do not use to treat untreated adrenal insufficiency
May affect blood sugar control in diabetes; monitor closely
Can increase the effect of blood thinners like warfarin
Separate from calcium, iron, antacids, and some cholesterol medicines by 4 hours
Long-term overtreatment may reduce bone density, especially in postmenopausal women
Tell your prescriber about all medications, supplements, and health conditions before starting levothyroxine 112mcg.
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