furosemide

How long does Furosemide stay in your body?

The elimination half-life of furosemide is about 2 hours (terminal elimination half-life in adults with normal kidney function) — the time it takes the body to clear about half of it. As a rule of thumb, a medicine is mostly gone after roughly 4 to 5 half-lives, though this varies from person to person with age and kidney or liver function. Linear kinetics — the label gives a single terminal half-life ("approximately 2 hours"). Furosemide is not a prodrug and has no clinically important active metabolite: its major biotransformation product, furosemide glucuronide, is not described as active. The half-life is prolonged when clearance falls — in reduced kidney function, in heart or liver failure, and especially in neonates — so the drug lingers longer in those groups. In a healthy adult, roughly 4–5 half-lives (about 8–10 hours) clears essentially all of a dose from the blood.

This is general information, not medical advice. It doesn’t tell you when a drug test would read negative (tests detect substances for different, often longer, windows) or when it’s safe to take another dose — ask your pharmacist or prescriber. Source: Furosemide Tablet — FDA label (DailyMed SPL), Clinical Pharmacology.

Frequently asked questions

What does Furosemide treat?

Furosemide (Furosemide) may be used to treat ascites, edema, heart failure, hypertension, chronic kidney failure, liver cirrhosis, based on NIH RxClass drug-classification data (conditions a drug may treat — not a verbatim copy of the FDA-approved label). This is general reference, not medical advice.

How does Furosemide work?

Furosemide is a loop diuretic. Loop diuretics such as furosemide block a salt-transport protein (the Na-K-2Cl cotransporter) in a part of the kidney called the loop of Henle. This stops sodium and chloride from being reabsorbed, so the body flushes out extra salt and water, relieving fluid buildup and swelling.

How much does Furosemide cost?

Nobody can tell you what you will pay — your price is set by your insurer's formulary, your deductible and the pharmacy's markup, and none of those are published. What IS published is what the pharmacy paid to acquire it: about $0.05 per ml, per the CMS NADAC survey. Treat that as the floor, not the quote — ask the pharmacist for the cash price as well as your copay, because for cheap generics the cash price often wins.

Is there a coupon or discount for Furosemide?

pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Furosemide. To pay less, Furosemide is already a generic — usually the lowest-cost version — so the main levers are comparing cash prices between pharmacies and using a pharmacy discount-card service. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.

Who makes Furosemide?

Furosemide is marketed by Pharmobedient. You can see Pharmobedient's full profile, rating, and other products on pharmaranks.

Is Furosemide a brand-name or generic drug?

Furosemide is a generic medication; its active ingredient is Furosemide. Generics contain the same active ingredient as the brand-name original and are usually lower cost.

Is Furosemide available over the counter?

No. Furosemide is a prescription (Rx) medication in the US — you need a prescription from a licensed clinician (in person or via telehealth); it isn't sold over the counter. For some conditions there are OTC alternatives — ask your pharmacist.

What forms does Furosemide come in?

Furosemide is currently marketed as injectable and tablet, per the FDA's National Drug Code Directory.

What class of drug is Furosemide?

Furosemide is classified as loop diuretic, per the FDA's Established Pharmacologic Class.

Is Furosemide FDA-registered?

Furosemide is on record with the U.S. FDA under application number NDA018487. You can verify this on its official FDA label.