{"id":630745,"date":"2024-12-13T20:33:26","date_gmt":"2024-12-14T01:33:26","guid":{"rendered":"https:\/\/www.singlecare.com\/blog\/?p=630745"},"modified":"2025-09-12T15:10:06","modified_gmt":"2025-09-12T19:10:06","slug":"torsemide-to-furosemide-conversion","status":"publish","type":"post","link":"https:\/\/www.singlecare.com\/blog\/torsemide-to-furosemide-conversion\/","title":{"rendered":"Switching from torsemide to furosemide"},"content":{"rendered":"

Torsemide<\/span><\/a>, also known as <\/span>torasemide<\/span>, is a <\/span>diuretic<\/span><\/a>. It treats <\/span>hypertension<\/span><\/a> (aka high <\/span>blood pressure<\/span>) and <\/span>edema<\/span><\/a> (aka fluid retention) caused by <\/span>congestive heart failure<\/span> or <\/span>chronic heart failure<\/span>, liver disease, and kidney disease. It comes in tablet form.<\/span><\/p>\n

Furosemide<\/span><\/a> is another diuretic used to treat fluid retention and high <\/span>blood pressure<\/span>. <\/span>Oral furosemide<\/span> is an option, or it can be taken by intramuscular injection or <\/span>intravenous<\/span> injection.<\/span><\/p>\n

People with high <\/span>blood pressure<\/span> are in good company: <\/span>S<\/span>tatistically<\/span>, <\/span>hypertension<\/span> affects more than 122 million people, according to the <\/span>American Heart Association<\/span>. High <\/span>blood pressure<\/span> is defined as the <\/span>systolic<\/span> number being higher than 130 mmHg or the diastolic number being 80 mmHg or more.\u00a0<\/span><\/p>\n

About 19% of people have <\/span>edema<\/span>, which often causes discomfort, weakness, and a limited range of motion.<\/span><\/p>\n

Both of these medical conditions often impact a person\u2019s <\/span>quality of life<\/span>. They can also contribute to more serious conditions, such as <\/span>heart disease<\/span> and other diseases.\u00a0<\/span><\/p>\n

Further, the <\/span>management of heart failure<\/span>, in particular, is important because decompensated heart failure can contribute to kidney and liver <\/span>dysfunction<\/span>, as well as the <\/span>worsening<\/span> of pulmonary <\/span>hypertension<\/span>. <\/span>Heart failure patients<\/span> are at increased risk for heart conditions of irregular heartbeat, valvular heart disease, and sudden cardiac arrest.<\/span><\/p>\n

Switching from <\/span>torsemide<\/span> to <\/span>furosemide<\/span><\/h2>\n

Treatment is important, but patients may not be satisfied with the medication they take due to ineffectiveness or a change in insurance coverage. For example, some people who take <\/span>torsemide<\/span> may want to switch to <\/span>furosemide<\/span><\/a> because of its benefits.<\/span><\/p>\n

First, note that <\/span>diuretic therapy<\/span> is a standard treatment for edema and is often an add-on medication to help control elevated blood pressure. Out of all the <\/span>loop diuretics<\/span>, these two are the most commonly used to treat <\/span>acute decompensated heart failure<\/span>, with the two hallmark symptoms of congestion and <\/span>volume overload<\/span>.<\/span><\/p>\n

Further, <\/span>thiazide<\/span> and similar diuretics aren\u2019t as effective as <\/span>loop diuretics<\/span> since they can only achieve a maximum <\/span>natriuresis<\/span> of about 3-5% of the filtered sodium load (aka they can\u2019t excrete as much sodium).<\/span><\/p>\n

In other words, <\/span>torsemide<\/span> and <\/span>furosemide<\/span> have benefits compared to similar medications. But can a person switch from <\/span>torsemide<\/span> to <\/span>furosemide<\/span>?\u00a0<\/span><\/p>\n

Clinicians<\/span> say yes.<\/span><\/p>\n

\u201cIt is possible and sometimes advisable to switch from <\/span>torsemide<\/span> to <\/span>furosemide<\/span>, depending on clinical judgment,\u201d says Dr. Raj Dasgupta, MD, the chief medical adviser for Fortune Recommends who\u2019s quadruple board-certified in <\/span>internal medicine<\/span>, critical care medicine, pulmonary medicine, and sleep medicine.<\/span><\/p>\n

Dr. Sam Setareh, MD<\/span>, a cardiologist at Cedars-Sinai Medical Center and director of clinical <\/span>cardiology<\/span> at Beverly Hills <\/span>Cardiovascular<\/span>, agrees. He says both torsemide and furosemide are <\/span>loop diuretics<\/span>, but they do have differences. Hence, there is a question about which is better or if switching medication is worth it.<\/span><\/p>\n

What are the benefits of switching from <\/span>torsemide<\/span> to <\/span>furosemide<\/span>?<\/span><\/h2>\n

People may want to <\/span>switch from <\/span>torsemide<\/span> to <\/span>furosemide<\/span><\/a> for a few reasons:<\/span><\/p>\n

Furosemide<\/span> is easier to get and take<\/span><\/h3>\n

Cost is one factor to consider. \u201c<\/span>Furosemide<\/span> is generally less expensive and more widely available than <\/span>torsemide<\/span>,\u201d Dr. Dasgupta says. (Those specifics are in the chart below.)<\/span><\/p>\n

Furosemide<\/span> also comes in more forms (oral, intramuscular, and intravenous) than <\/span>torsemide,<\/span> which is only available orally. So, if someone doesn\u2019t want to take torsemide by mouth\u2014the only way <\/span>it<\/span> can be taken\u2014they may want to change to <\/span>furosemide<\/span>.<\/span><\/p>\n

Furosemide has greater kidney <\/span>bioavailability,<\/span> and one dose works longer<\/span><\/h3>\n

\u201c<\/span>Bioavailability<\/span>\u201d refers to a medication\u2019s ability to be absorbed and used by the body. <\/span>Furosemide<\/span> has <\/span>greater kidney <\/span>bioavailability<\/span><\/a>. It has a longer duration of <\/span>natriuresis<\/span> (the removal of excess sodium through urination).<\/span><\/p>\n

Furosemide has a different <\/span>pharmacokinetic<\/span> profile<\/span><\/h3>\n

\u201cAnother reason could be specific clinical scenarios where <\/span>furosemide<\/span>\u2019s <\/span>pharmacokinetic<\/span> profile may be preferred over <\/span>torsemide<\/span>,\u201d Dr. Dasgupta says. \u201cThis may happen in cases of renal impairment where <\/span>furosemide<\/span>\u2019s higher <\/span>bioavailability<\/span> could offer better diuretic coverage.\u201d\u00a0<\/span><\/p>\n

However, some people may want to <\/span>switch from <\/span>furosemide<\/span><\/a> to <\/span>torsemide<\/span> or simply stay on <\/span>torsemide<\/span>.<\/span><\/p>\n

To explain the latter, let\u2019s look at the <\/span>TRANSFORM-HF<\/span> randomized<\/span> clinical trial<\/span><\/a>, which assessed the <\/span>effects of torsemide<\/span> and <\/span>furosemide<\/span>. While <\/span>furosemide<\/span> is the most commonly used <\/span>loop diuretic<\/span> for <\/span>heart failure<\/span>, <\/span>torsemide<\/span> may benefit myocardial fibrosis, <\/span>aldosterone<\/span> production, sympathetic activation, <\/span>ventricular<\/span> remodeling, and <\/span>natriuretic peptides<\/span>.<\/span><\/p>\n

Other <\/span>clinical outcomes<\/span> from this study were as follows: Patients in the <\/span>torsemide group<\/span> did not show a significant difference in all-<\/span>cause mortality<\/span> over 12 months compared to the <\/span>furosemide group<\/span>. The <\/span>patient-reported effects were similar<\/span><\/a> regardless of cardiac <\/span>ejection fraction<\/span>, previous <\/span>loop diuretic<\/span> use, and <\/span>baseline<\/span> health status.<\/span><\/p>\n

So, before making the switch, consider all the <\/span>differences between the two medications<\/span><\/a>:<\/span><\/p>\n\n\n\n\n\n\n\n\n\n\n
Torsemide vs. furosemide comparison chart<\/span><\/th>\n<\/tr>\n<\/thead>\n
<\/td>\nTorsemide<\/b><\/td>\nFurosemide<\/b><\/td>\n<\/tr>\n
Form<\/span><\/td>\nTablet<\/span><\/td>\nTablet, oral solution, intramuscular injection, or <\/span>intravenous<\/span> injection<\/span><\/td>\n<\/tr>\n
Dosage<\/span><\/td>\n5 to 20 mg mg once daily<\/span><\/td>\n20 to 80 mg, with the second dose given 6 to 8 hours later<\/span><\/td>\n<\/tr>\n
Bioavailability<\/span>\u00a0<\/span><\/td>\nGreater <\/span>bioavailability,<\/span> generally speaking<\/span><\/td>\nGreater kidney <\/span>bioavailability<\/span>\u00a0<\/span><\/td>\n<\/tr>\n
Cost<\/span><\/td>\n$6<\/span><\/td>\n$3<\/span><\/td>\n<\/tr>\n
Population treated<\/span><\/td>\nAdults<\/span><\/td>\nAdults and some children<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

How to switch from <\/span>torsemide<\/span> to <\/span>furosemide<\/span><\/h2>\n

Some special directions must be heeded with a <\/span>torsemide<\/span>-to-<\/span>furosemide<\/span> conversion.\u00a0<\/span><\/p>\n

For one, <\/span>equivalent doses<\/span> are not the same milligram. \u201cDosage adjustments are necessary since <\/span>torsemide<\/span> is more potent on a per milligram basis compared to <\/span>furosemide<\/span>,\u201d Dr. Dasgupta says. \u201cTypically, the conversation ratio is approximately 1:2.\u201d In other words, a patient taking 20 mg of <\/span>torsemide<\/span> may need 40 mg of <\/span>furosemide<\/span>.\u00a0<\/span><\/p>\n

\u201cIt\u2019s generally not necessary to taper off <\/span>torsemide<\/span> before starting <\/span>furosemide<\/span>,\u201d he adds, \u201cbut this should be guided by a <\/span>healthcare<\/span> provider\u2019s advice based on your health needs.\u201d<\/span><\/p>\n

Dr. Setareh agrees the switch should be monitored by a health professional, \u201cespecially in patients with kidney issues or <\/span>heart failure<\/span> to ensure effective fluid control and avoid dehydration.\u201d<\/span><\/p>\n

Thankfully, both <\/span>furosemide<\/span> and <\/span>torsemide<\/span> have similar drug interactions, according to Dr. Dasgupta, since they’re both <\/span>loop diuretics<\/span>. This means\u2014to an extent\u2014that patients shouldn\u2019t have to stop taking any drugs they were able to take while on <\/span>torsemide<\/span>.\u00a0<\/span><\/p>\n

However, the two drugs are still different. \u201c<\/span>Furosemide<\/span> might interact slightly differently due to its variable absorption and pharmacodynamics,\u201d Dr. Dasgupta adds. \u201cOne specific concern might be its interaction with drugs like lithium, as <\/span>furosemide<\/span> can increase lithium concentrations in the blood, potentially leading to toxicity.\u201d<\/span><\/p>\n

Dr. Setareh adds that <\/span>furosemide<\/span> may have slightly more potential for interactions\u2014especially with medications that affect <\/span>potassium<\/span> levels. \u201cFor instance, <\/span>furosemide<\/span> may more significantly affect <\/span>electrolyte<\/span> balance, so interactions with digoxin (which can be affected by <\/span>potassium<\/span> levels) may need closer monitoring.\u201d<\/span><\/p>\n

Side effects from stopping <\/span>torsemide<\/span> and starting <\/span>furosemide<\/span><\/h2>\n

Making this switch is generally pretty simple, though. \u201cMost patients tolerate the switch well if the dosage adjustments are correct,\u201d Dr. Setareh says.\u00a0<\/span><\/p>\n

However, since <\/span>furosemide<\/span> has a shorter half-life, he says, patients may notice increased urinary frequency or changes in fluid control patterns.<\/span><\/p>\n

Additionally, Dr. Dasgupta says that people who stop <\/span>torsemide<\/span> and start <\/span>furosemide<\/span> may have side effects due to the potency and duration of action. He notes an imbalance of fluids or <\/span>electrolyte<\/span> levels, which can show up as dehydration, altered <\/span>blood pressure<\/span>, or <\/span>electrolyte<\/span> disturbances.<\/span><\/p>\n

Dr. Setareh adds the risk of <\/span>potassium<\/span> and magnesium loss, as well as more frequent urination, as unique and common side effects of <\/span>furosemide<\/span>.\u00a0<\/span><\/p>\n

\u201c<\/span>Furosemide<\/span> may cause more pronounced fluctuations in these areas due to its higher <\/span>dosing variability<\/span><\/a> and less consistent absorption rates compared to <\/span>torsemide<\/span>,\u201d Dr. Dasgupta adds.<\/span><\/p>\n

Patients should be sure to schedule a <\/span>follow-up<\/span> visit with a medical provider and possibly lab blood tests so they can assess how their body reacts to <\/span>furosemide<\/span>.<\/span><\/p>\n

How to minimize <\/span>furosemide<\/span> side effects\u00a0<\/span><\/h3>\n

To minimize those side effects, both doctors recommend closely monitoring hydration and <\/span>electrolyte<\/span> levels\u2014especially in the first month after making the switch.<\/span><\/p>\n

\u201cRegularly scheduled blood tests may be necessary to adjust the dose to maintain balance,\u201d Dr. Dasgupta says. \u201cStaying well-hydrated and adhering to dietary recommendations regarding <\/span>potassium<\/span> and salt intake can also help mitigate risks.\u201d<\/span><\/p>\n

If someone experiences frequent urination as a side effect, Dr. Setareh encourages taking the medicine earlier in the day so they don\u2019t have to get up at night when trying to sleep.<\/span><\/p>\n

Can you take <\/span>furosemide<\/span> and <\/span>torsemide<\/span> together?<\/span><\/h2>\n

If these medications are the same in many ways, can someone take both?\u00a0<\/span><\/p>\n

\u201cGenerally, taking both <\/span>torsemide<\/span> and <\/span>furosemide<\/span> together is not recommended as they have similar functions, and combining them can increase the chance of severe dehydration and <\/span>electrolyte<\/span> imbalances,\u201d Dr. Dasgupta says.\u00a0<\/span><\/p>\n

He adds that it would also be unproductive. In fact, it could be harmful, increasing the risk of adverse side effects.\u00a0<\/span><\/p>\n

Dr. Setareh agrees, noting the risk of excessive <\/span>diuresis<\/span> as well as the potential of dehydration and <\/span>electrolyte<\/span> imbalances. \u201cThey should be used individually, with careful monitoring, to manage fluid levels effectively,\u201d he says.<\/span><\/p>\n

So, <\/span>healthcare<\/span> providers prescribe one or the other.<\/span><\/p>\n

The bottom line<\/span><\/h2>\n

Someone may want to switch from <\/span>torsemide<\/span> to <\/span>furosemide<\/span> because the latter is cheaper, available in more forms, has a longer duration of action, or for another reason. Dosage adjustments will be necessary, and side effects may occur. Be sure to talk to a medical provider for advice on safely switching to furosemide.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Torsemide, also known as torasemide, is a diuretic. It treats hypertension (aka high blood pressure) and edema (aka fluid retention) caused by congestive heart failure or chronic heart failure, liver disease, and kidney disease. It comes in tablet form. Furosemide is another diuretic used to treat fluid retention and high blood pressure. Oral furosemide is […]<\/p>\n","protected":false},"author":137,"featured_media":630746,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4589],"tags":[20951],"coauthors":[21001],"class_list":["post-630745","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-drug-info","tag-high-blood-pressure","wpautop"],"acf":[],"yoast_head":"\nSwitching from torsemide to furosemide: How to do it safely<\/title>\n<meta name=\"description\" content=\"The conversion ratio of torsemide to furosemide is typically about 1:2, which means 20 mg of torsemide would be equivalent to about 40 mg of furosemide.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.singlecare.com\/blog\/torsemide-to-furosemide-conversion\/\" \/>\n<meta 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