Eltroxin® (levothyroxine sodium) tablets: uses, dosing, and safety

What Eltroxin® Is and How It Works

Eltroxin® is a brand of levothyroxine sodium, a synthetic T4 hormone used to treat hypothyroidism and to suppress thyroid-stimulating hormone (TSH) in certain thyroid conditions. It is taken by mouth once daily. Strengths include several options, such as an Eltroxin 100 mcg tablet, making it easier to match the prescribed dose. You can buy eltroxin online from Youdrugstore to ship to the US.

YouDrugstore is a licensed Canadian pharmacy headquartered in Manitoba, and prescriptions are reviewed by licensed pharmacists before dispensing. We also partner with licensed and vetted international pharmacies so you can access authentic brand medications across many strengths at affordable pricing.

Levothyroxine replaces the hormone your thyroid normally makes. In the body, T4 converts to the active T3 hormone in tissues to help regulate metabolism, heart rate, temperature, and energy. Eltroxin medication is dosed in micrograms and adjusted based on symptoms and blood tests, mainly TSH. It is not approved for weight loss; using eltroxin for weight loss or taking high doses for obesity can cause serious adverse effects. Any concerns about eltroxin 100 mcg weight loss should be discussed with a prescriber.

Eltroxin doses available commonly include 25 mcg, eltroxin 50 mcg, 75 mcg, 88 mcg, 100 mcg, 112 mcg, eltroxin 125 mcg, 137 mcg, eltroxin 150 mcg, 175 mcg, and eltroxin 200 mcg. Some patients use 12.5 mcg by splitting a scored 25 mcg tablet (eltroxin 12.5 mcg). Eltroxin is a prescription medicine and is not over the counter.

Dosage and Usage

• Typical maintenance dose is individualized; many adults need about 1.6 mcg/kg/day. Older adults or patients with heart disease often start at 12.5–25 mcg daily.
• Take once daily on an empty stomach with water, ideally 30–60 minutes before breakfast, at the same time each day.
• Separate from calcium, iron, multivitamins, bile acid sequestrants, sucralfate, and some antacids by at least 4 hours.
• Consistent timing relative to coffee, high-fiber foods, and enteral feeds improves absorption.
• TSH is usually checked every 6–8 weeks after a dose change, then every 6–12 months when stable.
• Pregnancy often requires a dose increase; monitoring is more frequent.
• Missed dose: take it when remembered the same day. If close to the next dose, skip the missed dose. Do not double doses.
• Do not change brands or switch to generic levothyroxine without a plan for follow-up testing.

• Store tablets at 20–25 °C (68–77 °F) in a dry place, away from heat and light.
• Keep tablets in the original, tightly closed container. Do not remove desiccant if present.
• For travel, carry enough medicine in your hand luggage, plus a few extra days. Keep in the labeled bottle.
• Avoid pill organizers in humid environments. Moisture can reduce potency over time.
• Do not freeze or expose to excessive heat (above 30 °C / 86 °F) during transit or storage.

Benefits and Savings

Correcting low thyroid hormone can improve energy, focus, mood, skin and hair changes, bowel regularity, menstrual patterns, and cholesterol over time. Eltroxin tablet dosing is flexible across many strengths, which helps achieve a precise dose. Once-daily dosing supports routine use and stable TSH control.

Buying from Canada often reduces the eltroxin cost. Many US customers see 60–80% savings compared with typical US prices. You can compare eltroxin price by strength, including eltroxin 100 mcg price and eltroxin 50 mcg price, when you view the product page. Multi-month supplies may lower the per-month cost, and you can set gentle reorder reminders in your account.

Side Effects and Safety

• Common effects with higher-than-needed doses: palpitations, fast heartbeat, tremor, anxiety, sweating, heat intolerance, headache, and trouble sleeping.
• Digestive changes can include diarrhea or increased appetite.
• Temporary hair loss may occur, especially early in treatment.
• Muscle weakness or cramps may occur if the dose is off.
• Menstrual irregularities can happen when levels are not optimal.

Serious risks are uncommon when TSH is monitored. Overtreatment can increase the risk of atrial fibrillation, angina, or bone loss, especially in older adults. Undertreatment can worsen fatigue, cholesterol, or heart function. Allergic reactions to excipients are rare. Eltroxin is not indicated for obesity treatment; misuse for weight loss can cause severe or life-threatening effects.

Onset Time

Some symptom relief may appear within 1–2 weeks as levels rise. Energy, mood, and skin changes usually improve within 2–6 weeks. TSH takes 6–8 weeks to reach a new steady state after any dose change, so testing and dose adjustments are spaced accordingly. Cholesterol changes may take several months as the dose stabilizes.

Compare With Alternatives

Synthroid is another branded levothyroxine. Some patients remain on one brand for consistency in absorption. If changing between Eltroxin and another brand or generic levothyroxine, repeat TSH testing is usually needed to confirm the new dose is correct.

Generic levothyroxine sodium is widely used and may offer lower cost in some markets. Tablet excipients and dissolution can vary by manufacturer. Staying with a consistent product helps keep TSH stable.

Liothyronine (T3) or combination T4/T3 therapy is reserved for select patients who do not feel well on T4 alone despite a normal TSH. This approach needs close medical supervision and careful dosing.

Combination Therapy

• T4 plus T3: occasionally used in specific cases under specialist guidance; doses are small and titrated.
• With diabetes therapies: thyroid correction can change glucose needs. Prescribers may adjust insulin or oral agents after reviewing glucose logs.
• With calcium or iron: keep a 4-hour separation to avoid reduced levothyroxine absorption.
• With proton pump inhibitors or H2 blockers: absorption may vary; consistent timing and follow-up TSH help guide dosing.
• With warfarin: thyroid status can affect INR; monitoring may be needed when doses change.

Patient Suitability and Cost-Saving Tips

Eltroxin medicine treats primary, secondary, and tertiary hypothyroidism, and is used for TSH suppression in some thyroid cancer care plans. It is not for patients with uncorrected adrenal insufficiency or untreated thyrotoxicosis. Caution is used in ischemic heart disease, arrhythmias, and after recent heart attack. Pregnancy and breastfeeding are compatible with levothyroxine; dose and monitoring needs often increase.

Eltroxin 100 uses refer to the common 100 mcg strength prescribed for maintenance in many adults, but the correct dose varies. Children, older adults, and patients with heart disease usually require smaller starting doses. Switching brands or formulations should be coordinated with follow-up testing. Eltroxin levothyroxine sodium tablets are prescription-only; eltroxin over the counter options are not available.

To manage eltroxin cost, consider a 90-day supply when appropriate. Larger fills often reduce the per-month price. You can turn on simple reorder reminders in your account so you never run short. You can also compare strengths and pack sizes to find the best eltroxin price for your prescription.

Authoritative Sources

Aspen Pharmacare Canada product information

Health Canada Drug Product Database (DPD)

FDA levothyroxine sodium prescribing information

Order Eltroxin® from Youdrugstore: add to cart, upload your prescription, and we ship with prompt, express shipping.

This content is for education only and does not replace medical advice from your healthcare professional.