Adult dosage (ages 18–64 years) The usual starting dose is 80 mg per day, taken as 40 mg twice each day. Your doctor may change your dose or add other blood pressure medications.
In general, older patients have not reacted differently to furosemide than younger ones. However, many people older than 65 have impaired kidney function. If the kidneys don’t excrete the drug efficiently, it can build up and cause a toxic reaction.
Adults. The usual initial dose of LASIX for hypertension is 80 mg, usually divided into 40 mg twice a day. Dosage should then be adjusted according to response. If response is not satisfactory, add other antihypertensive agents.
Adults — The usual initial dose of LASIX is 20 mg to 80mg given as a single dose. Ordinarily a prompt diuresis ensues. If needed, the same dose can be administered 6 to 8 hours later or the dose may be increased.
What is the maximum dosage for Lasix? No more than 600 mg of oral furosemide should be taken in a single day. High doses are rarely used for hypertension but are possible in severe cases of edema.
High blood pressure (hypertension): Furosemide (Lasix) is usually taken twice a day for high blood pressure. Adults typically start with 40 mg per dose. Your provider will adjust your dose as needed.
Furosemide (Lasix), a diuretic, works quickly to relieve edema, or fluid retention. About an hour after you take it, you’ll find that you need to urinate. This effect continues for about six hours or more. Edema is a common side effect of heart failure as well as liver disease.
Adults—At first, 40 milligrams (mg) two times per day. Your doctor may adjust your dose as needed. Children—Use and dose must be determined by your doctor.
Make sure you drink enough water during any exercise and during hot weather when you are taking Lasix, especially if you sweat a lot. If you do not drink enough water while taking Lasix, you may feel faint or light-headed or sick. This is because your blood pressure is dropping suddenly and you are dehydrating.
Water pills like hydrochlorothiazide and furosemide, used for high blood pressure and edema, can cause dehydration and can also lead to swelling and inflammation of the kidneys.
Lasix is used to treat swelling of the ankles, feet, legs or even the brain or lungs. This swelling is called oedema and can occur in some heart, lung, liver or kidney conditions. Lasix may be used in some patients with more serious kidney problems who may have some fluid retention.
Too much furosemide can cause headaches, dizziness, a pounding or irregular heartbeat and fainting. You may also pee more than normal and feel thirsty. The amount of furosemide that can lead to an overdose varies from person to person.
Diuretics. Doctors commonly prescribe diuretics, such as furosemide (Lasix), to decrease the pressure caused by excess fluid in your heart and lungs.
Diuretics can stop working and that doesn’t mean anything bad necessarily. Different diuretics work on different parts of the kidney. If one stops working or doesn’t work as well, your doctor can change up your medications to see if something else works better.
What Are Side Effects of Lasix?
A dose of 20 mg furosemide in congestive heart failure patients produces a significant diuretic and natriuretic effect. The peak effect was observed within 60-120 minutes in most patients.