Euthyrox 100mcg Tablets
WARNING: Do not use this drug for weight loss. Severe and sometimes deadly side effects may happen with this drug if it is taken in large doses or with other drugs for weight loss. If you have questions, talk with the doctor. @ COMMON USES: It is used to add thyroid hormone to the body.It is used to manage thyroid cancer.It may be given to you for other reasons. Talk with the doctor.
Drug Class
Thyroid hormone replacement
Pharmacologic Class
Thyroid hormone
Pregnancy Category
Category A
FDA Approved
Jan 1955
DEA Schedule
Not Controlled
Overview
What is this medicine?
Levothyroxine is a medicine that replaces a hormone normally made by your thyroid gland. It's used when your thyroid gland doesn't make enough of this hormone (a condition called hypothyroidism). Taking this medicine helps your body's metabolism work properly, improving symptoms like fatigue, weight gain, and feeling cold.
How to Use This Medicine
Taking Your Medication Correctly
To get the most benefit from your medication, follow your doctor's instructions carefully. Read all the information provided with your prescription and follow the instructions closely.
Take your medication on an empty stomach, at least 30 to 60 minutes before breakfast.
Some brands of this medication may cause choking, gagging, or trouble swallowing. If you have one of these products, be sure to take it with a full glass of water. Check with your pharmacist if you're unsure.
If you need to, you can crush your tablet and mix it with 1 or 2 teaspoons (5 or 10 mL) of water. Take the dose immediately after mixing, and do not store it for later use.
Important Interactions to Consider
Do not take iron products, antacids containing aluminum or magnesium, or calcium carbonate within 4 hours before or 4 hours after taking your medication.
If you take other medications, they may need to be taken at a different time than your current medication. Check with your doctor or pharmacist for guidance on the best schedule.
Certain foods, such as soybean flour (found in infant formula), may affect how your medication works. Discuss this with your doctor.
If you regularly drink grapefruit juice or eat grapefruit, talk to your doctor about potential interactions.
Using the Correct Form of Your Medication
There are different brands and forms of this medication. Do not switch between them without consulting your doctor.
Continue taking your medication as directed by your doctor or healthcare provider, even if you're feeling well.
Storing and Disposing of Your Medication
Store your medication at room temperature in a dry place, away from the bathroom.
Protect your medication from heat and light.
If your medication comes in a blister pack, do not remove it until you're ready to take it. Do not store the removed medication for future use.
What to Do If You Miss a Dose
Take a missed dose as soon as you remember.
If it's close to the time for your next dose, skip the missed dose and return to your regular schedule.
* Do not take two doses at the same time or take extra doses.
To get the most benefit from your medication, follow your doctor's instructions carefully. Read all the information provided with your prescription and follow the instructions closely.
Take your medication on an empty stomach, at least 30 to 60 minutes before breakfast.
Some brands of this medication may cause choking, gagging, or trouble swallowing. If you have one of these products, be sure to take it with a full glass of water. Check with your pharmacist if you're unsure.
If you need to, you can crush your tablet and mix it with 1 or 2 teaspoons (5 or 10 mL) of water. Take the dose immediately after mixing, and do not store it for later use.
Important Interactions to Consider
Do not take iron products, antacids containing aluminum or magnesium, or calcium carbonate within 4 hours before or 4 hours after taking your medication.
If you take other medications, they may need to be taken at a different time than your current medication. Check with your doctor or pharmacist for guidance on the best schedule.
Certain foods, such as soybean flour (found in infant formula), may affect how your medication works. Discuss this with your doctor.
If you regularly drink grapefruit juice or eat grapefruit, talk to your doctor about potential interactions.
Using the Correct Form of Your Medication
There are different brands and forms of this medication. Do not switch between them without consulting your doctor.
Continue taking your medication as directed by your doctor or healthcare provider, even if you're feeling well.
Storing and Disposing of Your Medication
Store your medication at room temperature in a dry place, away from the bathroom.
Protect your medication from heat and light.
If your medication comes in a blister pack, do not remove it until you're ready to take it. Do not store the removed medication for future use.
What to Do If You Miss a Dose
Take a missed dose as soon as you remember.
If it's close to the time for your next dose, skip the missed dose and return to your regular schedule.
* Do not take two doses at the same time or take extra doses.
Lifestyle & Tips
- Take your dose once daily on an empty stomach, typically 30-60 minutes before breakfast, with a full glass of water. This helps your body absorb the medicine better.
- Avoid taking other medications (especially antacids, iron, calcium supplements) or certain foods (like soy products, high-fiber foods) within 4 hours of your levothyroxine dose, as they can interfere with absorption.
- Take your medicine consistently at the same time each day.
- Do not stop taking this medication without consulting your doctor, even if you feel better. This is usually a lifelong treatment.
- Inform your doctor about all other medications, supplements, and herbal products you are taking, as many can interact with levothyroxine.
- Regular blood tests (TSH) are crucial to ensure you are on the correct dose.
Available Forms & Alternatives
Available Strengths:
- Euthyrox 100mcg Tablets
- Euthyrox 0.125mg (125mcg) Tablets
- Euthyrox 88mcg Tablets
- Euthyrox 0.05mg (50mcg) Tablets
- Euthyrox 0.075mg (75mcg) Tablets
- Euthyrox 0.137mg (137mcg) Tab
- Euthyrox 0.175mg (175mcg) Tabs
- Euthyrox 0.150mg (150mcg) Tab
- Euthyrox 0.025mg (25mcg) Tab
- Euthyrox 0.112mg (112mcg) Tablets
- Euthyrox 0.2mg (200mcg) Tab
- Euthyrox 0.075mg (75mcg) Tablets
- Euthyrox 0.088mg (88mcg) Tablets
- Euthyrox 0.100mg (100mcg) Tablets
Dosing & Administration
Adult Dosing
Standard Dose:
Initial dose typically 1.6 mcg/kg/day orally once daily for primary hypothyroidism. Adjust by 12.5-25 mcg increments every 4-6 weeks based on TSH levels.
Dose Range:
25 - 300 mg
Condition-Specific Dosing:
hypothyroidism_initial:
1.6 mcg/kg/day orally once daily. Elderly or cardiac patients: 12.5-25 mcg/day initially, titrate slowly.
myxedema_coma:
300-500 mcg IV bolus, then 50-100 mcg IV daily until oral therapy can be resumed.
thyroid_cancer_suppression:
Higher doses to suppress TSH to target levels (e.g., <0.1 mIU/L or 0.1-0.5 mIU/L depending on risk).
Pediatric Dosing
Neonatal:
10-15 mcg/kg/day orally once daily (for congenital hypothyroidism).
Infant:
6-8 mcg/kg/day orally once daily (for 6-12 months).
Child:
4-6 mcg/kg/day orally once daily (for 1-5 years); 3-5 mcg/kg/day (for 6-12 years).
Adolescent:
2-3 mcg/kg/day orally once daily (for >12 years or during puberty); adult dose (1.6 mcg/kg/day) once growth is complete.
Dose Adjustments
Renal Impairment:
Mild:
No specific dose adjustment required.
Moderate:
No specific dose adjustment required.
Severe:
No specific dose adjustment required.
Dialysis:
No specific dose adjustment required; not significantly dialyzable.
Hepatic Impairment:
Mild:
No specific dose adjustment required.
Moderate:
No specific dose adjustment required.
Severe:
No specific dose adjustment required, but monitor TSH closely as hepatic metabolism may be altered in severe disease.
Pharmacology
Mechanism of Action
Levothyroxine (L-thyroxine) is a synthetic form of the natural thyroid hormone, thyroxine (T4). T4 is deiodinated in peripheral tissues to triiodothyronine (T3), the active form. T3 enters the cell nucleus and binds to thyroid hormone receptors, which then bind to specific DNA sequences (thyroid hormone response elements) to regulate gene expression, affecting protein synthesis and metabolism across various organ systems.
Pharmacokinetics
Absorption:
Bioavailability:
48-79% (highly variable, affected by food, gastric pH, and other medications)
Tmax:
2-4 hours
FoodEffect:
Decreased and delayed absorption when taken with food. Should be taken on an empty stomach, 30-60 minutes before breakfast.
Distribution:
Vd:
10-13 L
ProteinBinding:
Approximately 99% (primarily to thyroxine-binding globulin (TBG), transthyretin (TTR), and albumin)
CnssPenetration:
Limited (T4 crosses BBB to a limited extent, T3 crosses more readily)
Elimination:
HalfLife:
Approximately 7 days (range 6-10 days); shorter in hyperthyroidism, longer in hypothyroidism.
Clearance:
Approximately 0.05 L/hr
ExcretionRoute:
Primarily renal (conjugated metabolites), some fecal (unabsorbed drug and biliary excretion)
Unchanged:
Less than 20% (primarily as T4, most is metabolized)
Pharmacodynamics
OnsetOfAction:
Gradual, clinical effects typically seen within 3-5 days, but full therapeutic effect may take 4-6 weeks.
PeakEffect:
4-6 weeks (when steady-state TSH levels are achieved)
DurationOfAction:
Effects persist for several days after discontinuation due to long half-life.
Safety & Warnings
BLACK BOX WARNING
Thyroid hormones, including Euthyrox, either alone or with other therapeutic agents, should not be used for the treatment of obesity or for weight loss. In euthyroid patients, doses within the range of daily hormonal requirements are ineffective for weight reduction. Larger doses may produce serious or even life-threatening manifestations of toxicity, particularly when given in association with sympathomimetic amines such as those used for their anorectic effects.
Side Effects
Serious Side Effects: Seek Medical Help Immediately
Although rare, some people may experience severe and potentially life-threatening side effects while taking this medication. If you notice any of the following symptoms, contact your doctor or seek medical attention right away:
Signs of an allergic reaction, such as:
+ Rash
+ Hives
+ Itching
+ Red, swollen, blistered, or peeling skin with or without fever
+ Wheezing
+ Tightness in the chest or throat
+ Trouble breathing, swallowing, or talking
+ Unusual hoarseness
+ Swelling of the mouth, face, lips, tongue, or throat
Signs of high blood pressure, including:
+ Severe headache or dizziness
+ Passing out
+ Changes in eyesight
Chest pain or pressure
Fast or abnormal heartbeat
Shortness of breath
Sudden weight gain or swelling in the arms or legs
Headache
Feeling tired or weak
Changes in appetite
Unintentional weight change
Diarrhea
Stomach cramps
Vomiting
Mood changes, such as feeling irritable, nervous, excitable, or anxious
Shakiness
Trouble sleeping
Sensitivity to heat
Excessive sweating
Fever
Muscle cramps
Muscle weakness
Flushing
Bone pain
Changes in menstrual period (in women)
In children: hip or knee pain, or a limp
In infants: changes in the shape of the head and face
Other Possible Side Effects
Like all medications, this drug can cause side effects. Many people may not experience any side effects or may only have mild ones. If you notice any of the following side effects or any other unusual symptoms, contact your doctor for advice:
* Hair loss (usually temporary and resolves on its own within the first few months of treatment)
Reporting Side Effects
This is not an exhaustive list of possible side effects. If you have questions or concerns about side effects, contact your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.
Although rare, some people may experience severe and potentially life-threatening side effects while taking this medication. If you notice any of the following symptoms, contact your doctor or seek medical attention right away:
Signs of an allergic reaction, such as:
+ Rash
+ Hives
+ Itching
+ Red, swollen, blistered, or peeling skin with or without fever
+ Wheezing
+ Tightness in the chest or throat
+ Trouble breathing, swallowing, or talking
+ Unusual hoarseness
+ Swelling of the mouth, face, lips, tongue, or throat
Signs of high blood pressure, including:
+ Severe headache or dizziness
+ Passing out
+ Changes in eyesight
Chest pain or pressure
Fast or abnormal heartbeat
Shortness of breath
Sudden weight gain or swelling in the arms or legs
Headache
Feeling tired or weak
Changes in appetite
Unintentional weight change
Diarrhea
Stomach cramps
Vomiting
Mood changes, such as feeling irritable, nervous, excitable, or anxious
Shakiness
Trouble sleeping
Sensitivity to heat
Excessive sweating
Fever
Muscle cramps
Muscle weakness
Flushing
Bone pain
Changes in menstrual period (in women)
In children: hip or knee pain, or a limp
In infants: changes in the shape of the head and face
Other Possible Side Effects
Like all medications, this drug can cause side effects. Many people may not experience any side effects or may only have mild ones. If you notice any of the following side effects or any other unusual symptoms, contact your doctor for advice:
* Hair loss (usually temporary and resolves on its own within the first few months of treatment)
Reporting Side Effects
This is not an exhaustive list of possible side effects. If you have questions or concerns about side effects, contact your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.
Seek Immediate Medical Attention If You Experience:
- Symptoms of over-treatment (hyperthyroidism): rapid heart rate, palpitations, chest pain, nervousness, tremor, insomnia, excessive sweating, unexplained weight loss, diarrhea.
- Symptoms of under-treatment (hypothyroidism): persistent fatigue, weight gain, constipation, dry skin, hair loss, feeling cold, depression.
- Any new or worsening chest pain or shortness of breath.
Before Using This Medicine
Before Taking This Medication: Important Information to Share with Your Doctor
It is essential to inform your doctor about the following:
Any allergies you have, including allergies to this medication, its components, or other substances, such as foods or drugs. Be sure to describe the allergic reaction you experienced, including any symptoms that occurred.
Certain health conditions, including:
+ An overactive thyroid gland
+ A weak adrenal gland
+ Difficulty swallowing
This list is not exhaustive, and it is crucial to discuss all your health problems with your doctor.
Additionally, to ensure your safety, tell your doctor and pharmacist about:
All prescription and over-the-counter (OTC) medications you are taking
Any natural products or vitamins you are using
All your health problems
It is vital to verify that it is safe to take this medication with all your other medications and health conditions. Never start, stop, or change the dose of any medication without first consulting your doctor.
It is essential to inform your doctor about the following:
Any allergies you have, including allergies to this medication, its components, or other substances, such as foods or drugs. Be sure to describe the allergic reaction you experienced, including any symptoms that occurred.
Certain health conditions, including:
+ An overactive thyroid gland
+ A weak adrenal gland
+ Difficulty swallowing
This list is not exhaustive, and it is crucial to discuss all your health problems with your doctor.
Additionally, to ensure your safety, tell your doctor and pharmacist about:
All prescription and over-the-counter (OTC) medications you are taking
Any natural products or vitamins you are using
All your health problems
It is vital to verify that it is safe to take this medication with all your other medications and health conditions. Never start, stop, or change the dose of any medication without first consulting your doctor.
Precautions & Cautions
Important Information for All Patients Taking This Medication
It is essential to inform all your healthcare providers, including doctors, nurses, pharmacists, and dentists, that you are taking this medication. To ensure continuous treatment, do not allow your supply of this medication to run out. You may not experience the full effects of this medication for several weeks.
If you have diabetes (high blood sugar), consult with your doctor, as this medication may affect your blood sugar control. Your doctor may need to adjust your diabetes medications. Monitor your blood sugar levels as directed by your doctor and undergo regular blood tests as advised.
If you are taking biotin or a product containing biotin, stop taking it at least 2 days before having your thyroid levels checked to ensure accurate test results.
Potential Risks and Side Effects
High doses of this medication may increase the risk of developing weak bones (osteoporosis), particularly after menopause. Discuss your risk factors with your doctor, who can help determine if you are at a higher risk of osteoporosis.
This medication may also affect fertility, potentially leading to difficulty getting pregnant or fathering a child. If you plan to conceive, consult with your doctor before starting this medication.
Special Considerations
If you are 65 or older, use this medication with caution, as you may be more susceptible to side effects.
If you are pregnant, plan to become pregnant, or are breastfeeding, inform your doctor to discuss the potential benefits and risks to you and your baby.
Pediatric Patients
If your child is taking this medication and experiences a change in weight, consult with your doctor, as the dosage may need to be adjusted. Never give your child more of this medication than prescribed, as this can increase the risk of severe side effects.
In some cases, this medication may affect growth in children and teenagers. Regular growth checks may be necessary, so consult with your doctor to determine the best course of action.
It is essential to inform all your healthcare providers, including doctors, nurses, pharmacists, and dentists, that you are taking this medication. To ensure continuous treatment, do not allow your supply of this medication to run out. You may not experience the full effects of this medication for several weeks.
If you have diabetes (high blood sugar), consult with your doctor, as this medication may affect your blood sugar control. Your doctor may need to adjust your diabetes medications. Monitor your blood sugar levels as directed by your doctor and undergo regular blood tests as advised.
If you are taking biotin or a product containing biotin, stop taking it at least 2 days before having your thyroid levels checked to ensure accurate test results.
Potential Risks and Side Effects
High doses of this medication may increase the risk of developing weak bones (osteoporosis), particularly after menopause. Discuss your risk factors with your doctor, who can help determine if you are at a higher risk of osteoporosis.
This medication may also affect fertility, potentially leading to difficulty getting pregnant or fathering a child. If you plan to conceive, consult with your doctor before starting this medication.
Special Considerations
If you are 65 or older, use this medication with caution, as you may be more susceptible to side effects.
If you are pregnant, plan to become pregnant, or are breastfeeding, inform your doctor to discuss the potential benefits and risks to you and your baby.
Pediatric Patients
If your child is taking this medication and experiences a change in weight, consult with your doctor, as the dosage may need to be adjusted. Never give your child more of this medication than prescribed, as this can increase the risk of severe side effects.
In some cases, this medication may affect growth in children and teenagers. Regular growth checks may be necessary, so consult with your doctor to determine the best course of action.
Overdose Information
Overdose Symptoms:
- Palpitations
- Tachycardia (rapid heart rate)
- Arrhythmias (irregular heartbeat)
- Chest pain (angina)
- Tremor
- Nervousness
- Insomnia
- Diarrhea
- Weight loss
- Heat intolerance
- Fever
- Seizures (rare, severe cases)
- Coma (rare, severe cases)
What to Do:
Seek immediate medical attention. Call 911 or your local emergency number. For poison control, call 1-800-222-1222. Management may include supportive care, beta-blockers for cardiac symptoms, and measures to reduce absorption if recent ingestion.
Drug Interactions
Major Interactions
- Amiodarone (can cause hypo- or hyperthyroidism, monitor thyroid function)
- Oral anticoagulants (e.g., Warfarin - may increase anticoagulant effect, monitor INR)
- Sympathomimetics (e.g., Epinephrine, Norepinephrine - increased risk of cardiac adverse effects)
- Tricyclic antidepressants (e.g., Amitriptyline - increased sensitivity to TCAs, increased risk of arrhythmias)
- Insulin/Oral Hypoglycemics (may increase insulin/hypoglycemic requirements, monitor glucose)
Moderate Interactions
- Antacids (aluminum, magnesium, calcium carbonate - decrease levothyroxine absorption, separate administration by 4 hours)
- Iron supplements (ferrous sulfate - decrease levothyroxine absorption, separate administration by 4 hours)
- Calcium supplements (calcium carbonate - decrease levothyroxine absorption, separate administration by 4 hours)
- Bile acid sequestrants (e.g., Cholestyramine, Colestipol - decrease levothyroxine absorption, separate administration by 4-6 hours)
- Proton pump inhibitors (e.g., Omeprazole - may decrease levothyroxine absorption due to increased gastric pH)
- Sucralfate (decreases levothyroxine absorption, separate administration by 4 hours)
- Soy products (may decrease levothyroxine absorption, monitor TSH)
- Certain foods (e.g., grapefruit juice, dietary fiber - may affect absorption)
- Enzyme-inducing drugs (e.g., Phenytoin, Carbamazepine, Rifampin, Phenobarbital - increase levothyroxine metabolism, may require higher dose)
- Estrogens/Oral Contraceptives (increase TBG, may increase levothyroxine requirements)
- Androgens/Anabolic Steroids (decrease TBG, may decrease levothyroxine requirements)
- Corticosteroids (may affect thyroid hormone metabolism and binding)
- Beta-blockers (e.g., Propranolol - may inhibit peripheral conversion of T4 to T3)
- Digoxin (levothyroxine may decrease digoxin levels, monitor digoxin levels)
Minor Interactions
- Caffeine (minimal effect on absorption, but generally advised to take on empty stomach)
Monitoring
Baseline Monitoring
Thyroid Stimulating Hormone (TSH)
Rationale: Primary diagnostic marker for hypothyroidism and key parameter for dose titration.
Timing: Before initiating therapy.
Free Thyroxine (Free T4)
Rationale: Confirms diagnosis and helps assess severity, especially in central hypothyroidism.
Timing: Before initiating therapy.
Clinical symptoms of hypothyroidism
Rationale: To establish baseline and track improvement.
Timing: Before initiating therapy.
Cardiac status (ECG, history of CAD)
Rationale: To assess risk for cardiac adverse events, especially in elderly or those with pre-existing heart disease, as thyroid hormones increase metabolic demand.
Timing: Before initiating therapy, particularly in older adults or those with cardiac risk factors.
Routine Monitoring
Thyroid Stimulating Hormone (TSH)
Frequency: Every 4-6 weeks until stable, then every 6-12 months once stable.
Target: Typically 0.4-4.0 mIU/L (individualized based on age, comorbidities, and specific condition).
Action Threshold: Adjust dose if TSH is outside target range.
Free Thyroxine (Free T4)
Frequency: May be checked with TSH, especially if TSH is suppressed or in central hypothyroidism.
Target: Typically 0.8-1.8 ng/dL (or laboratory specific reference range).
Action Threshold: Adjust dose if Free T4 is consistently outside target range, especially if TSH is also abnormal.
Clinical symptoms (e.g., fatigue, weight, mood, cold intolerance)
Frequency: At each visit.
Target: Resolution or improvement of hypothyroid symptoms.
Action Threshold: Persistent or worsening symptoms may indicate need for dose adjustment or investigation of other causes.
Weight
Frequency: At each visit.
Target: Stable weight or weight loss if previously gained due to hypothyroidism.
Action Threshold: Significant unexplained weight changes may indicate over- or under-treatment.
Cardiac function (pulse, blood pressure, symptoms of angina/arrhythmia)
Frequency: At each visit, especially during dose titration.
Target: Normal cardiac parameters.
Action Threshold: New or worsening cardiac symptoms (e.g., palpitations, chest pain) require immediate evaluation and potential dose reduction.
Symptom Monitoring
- Fatigue
- Weight changes (gain or loss)
- Cold intolerance
- Constipation
- Dry skin
- Hair loss
- Bradycardia or Tachycardia
- Palpitations
- Nervousness or anxiety
- Tremor
- Insomnia
- Chest pain or angina
- Muscle weakness or aches
- Changes in menstrual cycle
- Depression or mood changes
Special Patient Groups
Pregnancy
Levothyroxine is considered safe and essential during pregnancy (Category A). Thyroid hormone requirements often increase during pregnancy, typically by 25-50% or more. Close monitoring of TSH levels (every 4-6 weeks) is crucial to ensure adequate dosing and fetal development.
Trimester-Specific Risks:
First Trimester:
Untreated maternal hypothyroidism in the first trimester is associated with increased risks of miscarriage, preterm birth, preeclampsia, and impaired neurocognitive development in the child. Dose adjustments are often needed early in pregnancy.
Second Trimester:
Continued monitoring and dose adjustment as needed to maintain TSH within trimester-specific target ranges.
Third Trimester:
Continued monitoring and dose adjustment as needed. Maternal hypothyroidism can lead to adverse fetal outcomes.
Lactation
Levothyroxine is compatible with breastfeeding (L1 - safest). Only small amounts are excreted into breast milk, which are not considered clinically significant to the infant. It is essential for the mother's health and does not pose a risk to the nursing infant.
Infant Risk:
Minimal to no risk to the infant.
Pediatric Use
Dosing is weight-based and higher per kg than in adults, especially in neonates and infants, due to higher metabolic rates and rapid growth. Regular monitoring of TSH and Free T4 is critical to ensure proper growth and neurocognitive development. Congenital hypothyroidism requires prompt and adequate treatment to prevent irreversible intellectual disability.
Geriatric Use
Lower initial doses (e.g., 12.5-25 mcg/day) are recommended, especially in elderly patients or those with underlying cardiovascular disease, due to increased sensitivity to thyroid hormones and risk of cardiac adverse events. Dose titration should be slower and more cautious. Monitor for cardiac symptoms.
Clinical Information
Clinical Pearls
- Always take levothyroxine on an empty stomach, 30-60 minutes before breakfast, with water, and separate from other medications and supplements by at least 4 hours.
- Consistency is key: take it at the same time every day.
- The brand or generic formulation should ideally not be switched without consulting a physician, as bioequivalence can vary, potentially requiring dose adjustments.
- TSH is the primary lab test for monitoring, but Free T4 may be useful in specific situations (e.g., central hypothyroidism, TSH suppression therapy).
- Symptoms of over- or under-treatment often precede changes in TSH levels; educate patients on these symptoms.
- Patients with pre-existing cardiac disease should be started on very low doses and titrated slowly to avoid precipitating angina or arrhythmias.
- Patients should be advised that it takes 4-6 weeks for a new dose to reach steady-state and for TSH levels to stabilize.
Alternative Therapies
- Liothyronine (T3) - used in specific cases, such as myxedema coma (IV) or for short-term TSH suppression before radioactive iodine therapy, but generally not for chronic monotherapy due to shorter half-life and fluctuating levels.
Cost & Coverage
Average Cost:
$15 - $50 per 30 tablets (for 100mcg)
Generic Available:
Yes
Insurance Coverage:
Tier 1 or 2 (preferred generic or brand)
General Drug Facts
If your symptoms or health issues persist or worsen, it's essential to contact your doctor for further guidance. To ensure your safety, never share your medication with others or take someone else's medication. Some medications may come with an additional patient information leaflet, so be sure to check with your pharmacist for more details. If you have any questions or concerns about your medication, don't hesitate to reach out to your doctor, nurse, pharmacist, or other healthcare provider. In the event of a suspected overdose, immediately call your local poison control center or seek emergency medical attention. When seeking help, be prepared to provide information about the medication taken, the amount, and the time it happened.