furosemide vs liothyronine
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Side-by-side comparison of furosemide and liothyronine. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
Other drugs: Carbamazepine Furosemide (>80 mg IV) Heparin Hydantoins Non-Steroidal Anti-inflammatory Drugs - Fenamates These drugs may cause protein binding site displacement. Furosemide has been shown to inhibit the protein binding of T4 to TBG and albumin, causing an increased free-T4 fraction in serum. Furosemide competes for T4-binding sites on TBG, prealbumin, and albumin, so that a single high dose can acutely lower the total T4 level.
Lasix
Cytomel
Furosemide is a water pill (diuretic). It helps your body get rid of extra water and salt.
Liothyronine (Cytomel) is a medicine that replaces a thyroid hormone called T3. It helps your body work properly if you don't make enough thyroid hormone on your own.
This medicine treats swelling (edema) from heart failure, liver problems, or kidney disease. It can also treat high blood pressure. Furosemide is helpful when you need a stronger diuretic.
This medicine treats hypothyroidism, a condition where your thyroid gland doesn't make enough thyroid hormone. It can also be used with surgery and radiation to manage thyroid cancer. Liothyronine can also be used for thyroid suppression tests to check for mild hyperthyroidism.
Furosemide works in your kidneys. It helps your kidneys remove more salt and water from your blood. This lowers the amount of fluid in your body and lowers blood pressure.
Liothyronine is a synthetic form of the T3 thyroid hormone. It works by increasing thyroid hormone levels in your body. This helps to regulate your body's metabolism and energy levels.
- • Dizziness
- • Headache
- • Blurred vision
- • Nausea
- • Vomiting
- • Fatigue
- • Increased appetite
- • Weight loss
- • Feeling hot
- • Fever
- Dyspnoea 29,104
- Fatigue 20,393
- Diarrhoea 19,937
- Nausea 18,692
- Acute Kidney Injury 18,530
- Headache 859
- Fatigue 816
- Nausea 569
- Dyspnoea 549
- Pain 469
Furosemide can cause you to lose too much fluid and electrolytes. This can lead to dehydration, low blood pressure, and kidney problems. Your doctor should check your blood regularly while you are taking this medicine.
This medicine should not be used for weight loss or to treat obesity. Taking high doses of thyroid hormone for weight loss can cause serious and life-threatening side effects, especially when taken with stimulant medicines.
Tell your doctor if you are pregnant or plan to become pregnant. Furosemide may not be safe during pregnancy. Talk to your doctor about the risks and benefits of taking this medicine while breastfeeding.
Tell your doctor if you are pregnant or plan to become pregnant. Your dose of liothyronine may need to be adjusted during pregnancy. This medicine passes into breast milk, but it is not expected to harm your baby.
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How to Read This furosemide vs liothyronine Comparison
furosemide is classified in the Loop Diuretic drug class, while liothyronine sits within the Thyroid Hormone (T3) class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, furosemide has 106,656 submissions while liothyronine has 3,262. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to this water pill can knock thyroid hormones off the proteins they usually ride on in your blood, which changes the amount of active hormone in your body.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for furosemide or liothyronine.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.