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Synthroid (Levothyroxine)
| Levothyroxine Sodium (Generic) Levothyroxine Sodium | ||||||
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Shipped from Mauritius | ||||||
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Who is the product for? YouOtherAdd Family Member/PetYou must be logged in to add additional members to the order. Don't have an account? or Add Family Member/PetSign inTo continue, please enter your email address and password that you use for your account. | ||||||
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Who is the product for? YouOtherAdd Family Member/PetYou must be logged in to add additional members to the order. Don't have an account? or Add Family Member/PetSign inTo continue, please enter your email address and password that you use for your account. | ||||||
| Select product strength & quantity:
Who is the product for? YouOtherAdd Family Member/PetYou must be logged in to add additional members to the order. Don't have an account? or Add Family Member/PetSign inTo continue, please enter your email address and password that you use for your account. | ||||||
| Select product strength & quantity:
Who is the product for? YouOtherAdd Family Member/PetYou must be logged in to add additional members to the order. Don't have an account? or Add Family Member/PetSign inTo continue, please enter your email address and password that you use for your account. | ||||||
| Thyrox (Generic) Levothyroxine | ||||||
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Shipped from Mauritius | ||||||
| | ||||||
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Who is the product for? YouOtherAdd Family Member/PetYou must be logged in to add additional members to the order. Don't have an account? or Add Family Member/PetSign inTo continue, please enter your email address and password that you use for your account. | ||||||
General Medication Fact Sheet for Synthroid
| Field | Information |
|---|---|
| Medication Name | Synthroid |
| Generic Name | Levothyroxine Sodium |
| Purpose | Thyroid hormone replacement for hypothyroidism |
| Mechanism of Action | Replaces or supplements thyroxine (T4), which is converted to triiodothyronine (T3), binding to thyroid hormone receptors and exerting metabolic effects. |
| Dosage Forms | Oral tablets |
| Available Strengths | 25 mcg, 50 mcg, 75 mcg, 88 mcg, 100 mcg, 112 mcg, 125 mcg, 137 mcg, 150 mcg, 175 mcg, 200 mcg, 300 mcg |
| Dosage Frequency | Once daily |
| Common Side Effects | Headache, nervousness, irritability, insomnia, increased appetite, weight loss, sweating, palpitations, tremor |
| Serious Side Effects | Chest pain, rapid or irregular heartbeat, shortness of breath, swelling in ankles or feet, seizures |
| Drug Interactions | Warfarin, digoxin, insulin or oral diabetes medications, bile acid sequestrants (e.g., cholestyramine, colestipol), calcium carbonate, iron supplements, proton pump inhibitors (PPIs), certain antidepressants |
| Important Notes | Take on an empty stomach, 30-60 minutes before breakfast. Do not switch brands without consulting your doctor. Regular blood tests are needed to monitor thyroid hormone levels. |
| Storage | Store at room temperature away from moisture, heat, and light. |
| Missed Dose | Take as soon as you remember, unless it is almost time for your next dose. Do not double the dose. |
| Alternatives | Levoxyl, Unithroid, Tirosint, Cytomel (liothyronine) |
Synthroid Alternatives
| Medication | Mechanism of Action | Notes |
|---|---|---|
| Levoxyl (levothyroxine) | Synthetic T4 hormone replacement | Another brand-name levothyroxine product; absorption may vary between brands. |
| Unithroid (levothyroxine) | Synthetic T4 hormone replacement | Another brand-name levothyroxine product; absorption may vary between brands. |
| Tirosint (levothyroxine) | Synthetic T4 hormone replacement (gel capsule) | Hypoallergenic formulation of levothyroxine. |
| Cytomel (liothyronine) | Synthetic T3 hormone replacement | Contains T3 instead of T4; faster-acting but shorter duration. Not typically first-line treatment. |
Synthroid Side Effects
| Common Side Effects | Serious Side Effects |
|---|---|
| Headache | Chest pain |
| Nervousness | Rapid or irregular heartbeat |
| Irritability | Shortness of breath |
| Insomnia | Swelling in ankles or feet |
| Increased appetite | Seizures |
| Weight loss | Heart attack |
| Sweating | Stroke |
| Palpitations | Thyroid storm (severe hyperthyroidism) |
Synthroid Dosage Guide
| Condition | Starting Dose | Maintenance Dose | Administration Notes |
|---|---|---|---|
| Hypothyroidism (Adults) | 1.6 mcg/kg/day (approx. 100-125 mcg for a 70 kg person) | Adjusted based on TSH levels | Take on an empty stomach, 30-60 minutes before breakfast. |
| Hypothyroidism (Elderly/Cardiac Disease) | 12.5-25 mcg daily | Gradually increased based on TSH levels | Start with a low dose to avoid cardiac stress. |
| Hypothyroidism (Children) | Dosage varies based on age and weight; consult a pediatrician | Adjusted based on TSH levels | Crush and mix with a small amount of water if the child cannot swallow the tablet. |
Synthroid Price With And Without Insurance
| Purchase Context | Estimated Price |
|---|---|
| With Insurance | $5 |
| Without Insurance (U.S.) | $40 |
| From Canada | $10 |
