Taking high doses of levothyroxine with furosemide can make levothyroxine less effective. Taking sucralfate with furosemide can make furosemide less effective. Taking other diuretics with furosemide can increase your risk of hearing damage or loss. However, because drugs interact differently in each person, we cannot guarantee that this information includes all possible interactions.
Always speak with your healthcare professional about possible interactions with all prescription drugs, vitamins, herbs and supplements, and over-the-counter drugs that you are taking.
If you have an allergy to sulfonamides sulfa drugs , you may also be allergic to furosemide. Taking this drug can cause a severe allergic reaction, causing symptoms such as:. Taking it a second time after any allergic reaction to it could be fatal cause death.
For instance, it can worsen a sudden drop in blood pressure when you stand up after sitting or lying down. It can also make you feel dizzier or more lightheaded. For people with kidney problems: Furosemide is removed from your body by your kidneys. If you have kidney problems, more of the drug may stay in your body longer. This could lead to dangerous side effects, including very low blood pressure.
Your doctor may start you on a lower dose of this drug. Your doctor may also monitor how well your kidneys are working to make sure furosemide is safe for you to take. Furosemide can cause very low electrolyte levels, which can cause serious liver damage and loss of brain function. Electrolytes are minerals that help control the fluid balance in your body and help with other important functions.
Your doctor will monitor you closely. For people with diabetes : Furosemide can make it harder to control your blood sugar glucose levels. Before taking this drug, be sure your doctor knows you have diabetes. For people with bladder disorders: If you have severe problems with emptying your bladder completely, furosemide can make your condition worse.
Before taking this drug, be sure your doctor knows you have a bladder disorder. For people with thyroid problems: High doses over 80 mg of furosemide can cause low levels of thyroid hormones. Be sure to tell your doctor about your thyroid problems before you start taking furosemide. For pregnant women: Furosemide is a category C pregnancy drug.
That means two things:. This drug should only be used if the potential benefit justifies the potential risk to the fetus.
For women who are breastfeeding: Furosemide may pass into breast milk and can cause serious side effects in a child who is breastfed. It may also cause your body to produce less milk.
Tell your doctor if you are breastfeeding. You will need to decide either to stop breastfeeding, or stop taking this drug. For children: In premature infants and children younger than 4 years of age, furosemide may cause kidney problems. It can lead to kidney stones and calcium deposits in the kidneys. If furosemide is given to premature infants during the first few weeks of life, it may increase the risk of problems with the lungs and heart.
This dosage information is for furosemide oral tablet. All possible dosages and drug forms may not be included here. Your dose, drug form, and how often you take the drug will depend on:.
The kidneys of older adults may not work as well as they used to. This can cause your body to process drugs more slowly. As a result, more of a drug stays in your body for a longer time. This increases your risk of side effects. Your doctor may start you on a lowered dose or a different medication schedule. This can help keep levels of this drug from building up too much in your body.
Furosemide is removed from your body by your kidneys. This can cause dangerous side effects. Your doctor may start you on a lower dose and monitor how well your kidneys are working to make sure this drug is safe for you. However, because drugs affect each person differently, we cannot guarantee that this list includes all possible dosages. Always speak with your doctor or pharmacist about dosages that are right for you. Furosemide oral tablet is used for short-term or long-term treatment.
This raises your risk of serious problems such as stroke or heart attack. If you are treating edema, your swelling could get worse. This doesn't mean that the medicine isn't working. It's important to keep taking it. Depending on the reason why you're on furosemide, you may have to take it for a long time, even for the rest of your life.
Furosemide is safe to take for a long time, but you will have to see your doctor or nurse every so often for blood and urine tests. These make sure the chemicals in your blood are properly balanced. How often you need to see your doctor or nurse for these tests will depend on the reason why you're taking furosemide, if your dose has changed recently, or if you have any other health problems.
Even if furosemide brings down your blood pressure successfully, it's best to carry on taking it. If you stop taking it, your blood pressure could go back up again. If you need medicines to lower your blood pressure, you'll probably need them for the rest of your life. Remember, by keeping your blood pressure low, you're protecting yourself against having a heart attack or stroke in the future.
Stopping it may cause your blood pressure to rise - and this may increase your risk of heart attack and stroke. If you're bothered by side effects, your doctor may be able to prescribe you a different medicine. There are 3 different types of diuretic: loop diuretics such as furosemide , thiazide diuretics and potassium-sparing diuretics. Each type of diuretic works on a different part of the kidney. It's usually best to drink normally while you're taking furosemide. A good rule is to drink enough fluid so that you're not thirsty for long periods.
And to steadily increase your fluid intake when exercising and during hot weather. Passing pale, clear pee is a good sign that you're drinking enough.
However, if you have heart failure or kidney problems you might need to limit how much fluid you drink. Your doctor or nurse will tell you exactly how much you need to drink each day.
If you're ill with a fever a high temperature above 38C , sweats and shaking, being sick vomiting or have severe diarrhoea, contact your doctor as you may need to stop taking furosemide for 1 to 2 days until you are better.
You can start to take it again when you're eating and drinking normally. If you take furosemide when you have an illness that can make you dehydrated, it can make the dehydration worse. During the first few days of taking furosemide, it is best to stop drinking until you see how the medicine affects you. It may lower your blood pressure and make you feel dizzy.
If you feel OK, you can drink alcohol in moderation by following the national guidelines of no more than 14 units a week for men and women. A standard glass of wine ml is 2 units. A pint of lager or beer is usually 2 to 3 units of alcohol.
If you're taking furosemide for high blood pressure or oedema a build up of fluid , you may lose a bit of weight as your body loses water. But do not take furosemide specifically to lose weight. Only take furosemide if it's been prescribed, and only for the reason your doctor has prescribed it for you.
Tell your doctor that you're taking furosemide if you're going to be put to sleep with a general anaesthetic for an operation or you're going to have a major operation - such as a Caesarean section - without a general anaesthetic. Furosemide can reduce your blood pressure when it's used with a general anaesthetic. Your doctor may advise you to stop taking furosemide 24 hours before surgery. If you're taking a diuretic such as furosemide, it's important not to have too much salt in your food because this can stop it working.
Do not eat foods that have a lot of salt in them, such as processed foods or ready-meals. Do not add extra salt when you're cooking or at the table. Also, do not buy salt substitutes instead of ordinary table salt, as they contain a lot of potassium, which can interfere with certain medicines or cause side effects.
Adults generally are advised to eat no more than 6 grams of salt a day. Your doctor will tell you if you need to eat even less than this. However, some types of hormonal contraception, like the combined pill and contraceptive patch , aren't usually recommended for women taking furosemide. This is because some hormonal contraceptives can raise your blood pressure and stop the medicine working properly. There's no evidence that furosemide reduces fertility in men or women.
However, if you're a woman and you're trying to get pregnant, talk to your doctor first as this medicine is usually not recommended in pregnancy. You can boost your general health - plus the health of your heart - by making some key lifestyle changes. These will also help if you have high blood pressure or heart failure. Page last reviewed: 10 January Next review due: 10 January Furosemide On this page About furosemide Key facts Who can and cannot take furosemide How and when to take it Side effects How to cope with side effects Pregnancy and breastfeeding Cautions with other medicines Common questions.
About furosemide Furosemide is a type of medicine called a diuretic. Furosemide sometimes comes mixed with other diuretics or potassium. Help us improve our website Can you answer a quick question about your visit today? It's usual to take furosemide once a day in the morning. Some people take it twice a day - once in the morning and again at lunchtime.
Furosemide doesn't usually upset your tummy. You can take it whether or not you've eaten a meal or snack recently. The main side effect of furosemide is peeing more often than normal. Most people need to pee about 30 minutes after taking furosemide, and again within a few hours.
Do not take furosemide after 4pm or you may have to wake in the night to go to the toilet. Furosemide is also called by the brand names Frusol and Lasix.
Furosemide can be taken by most adults and children, including babies. To make sure furosemide is safe for you, tell your doctor if you have : had an allergic reaction to furosemide or any other medicine in the past low blood pressure symptoms of dehydration , such as being thirsty, having a dry mouth and dark pee liver disease diabetes difficulty peeing a disorder of your adrenal glands called Addison's disease gout an intolerance to, or you cannot absorb, some sugars such as lactose in milk or maltitol in corn syrup Tell your doctor that you are taking furosemide if you're going to have : a glucose test a test such as an X-ray or scan that involves a dye containing iodine being injected into your blood a major operation or a general anaesthetic to put you to sleep.
When will I take it? How much will I take? The usual dose in adults to treat high blood pressure is 20mg to 80mg a day. The usual dose in adults to treat heart failure or oedema fluid build up in the body is 20mg to mg a day. How to take it Furosemide doesn't usually upset your tummy so you can take it whether or not you've eaten recently. Swallow the tablets whole with a drink of water.
Some people take furosemide mixed with other diuretics or potassium: with amiloride also called co-amilofruse, Frumil or Frumil LS with spironolactone also called Lasilactone with triamterene also called Frusene with potassium also called Diumide-K Continus What if I forget to take it? Because of possible drug interactions, Lasix should not be taken with certain types of drugs. Some medications should never be combined with Lasix and other medications should try to be avoided, but several types of drugs will require caution and possible dose adjustments when taken with Lasix.
Because of the risk of dehydration, electrolyte imbalances, kidney damage, or circulatory collapse, drugs to be avoided or used cautiously with Lasix include:. Finally, other medications to avoid or use cautiously are:. People taking Lasix or any other diuretic may experience unwanted side effects.
As a tablet, people generally take Lasix every day, sometimes for a prolonged period. A few safety guidelines can help maximize its benefits while minimizing the risk of side effects. Follow all the directions given by a healthcare provider or printed on the prescription label. The standard dose is 40— mg per day for edema and mg twice daily for hypertension.
If the dose is divided into two daily doses, do not skip a dose or combine two doses into one. Do not take more or less than prescribed until consulting with a doctor or healthcare professional.
Many medical conditions and drugs can affect the safety of taking Lasix, so make sure the prescribing doctor or healthcare professional is well-informed about:.
A doctor or healthcare provider will explain how much and what kind of fluids to take after a dose of Lasix. These may be restricted to ensure the success of the therapy. Still, watch for signs of severe dehydration or electrolyte depletion. These include:. If fluids are not restricted, immediately take fluids at signs of dehydration.
If fluids are restricted, call a healthcare provider for medical advice. To avoid electrolyte imbalances, people will often be prescribed potassium supplementation such as Klor-Con. Use extra caution on hot summer days, as people are more likely to get dehydrated and lose electrolytes. People can either avoid or limit their time spent outdoors on hot days and always carry a water bottle.
To avoid some of the more serious side effects, make sure that all appointments are kept and necessary tests are taken. The purpose of these tests and visits is partly to monitor any adverse effects before they become serious medical problems. Some people with pre-existing medical conditions may be asked to regularly monitor body weight, blood pressure, or blood sugar.
Check these values faithfully with store-bought bathroom scales, blood pressure cuffs, or blood glucose testers.
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