{"id":39131,"date":"2026-10-05T10:09:57","date_gmt":"2026-10-05T14:09:57","guid":{"rendered":"https:\/\/nephcure.org\/?page_id=39131"},"modified":"2026-10-05T10:10:05","modified_gmt":"2026-10-05T14:10:05","slug":"filspari-sparsentan-for-fsgs","status":"publish","type":"page","link":"https:\/\/nephcure.org\/es\/managing-rkd\/treatment-options\/filspari-sparsentan-for-fsgs\/","title":{"rendered":"FILSPARI\u00ae (Sparsentan) for FSGS"},"content":{"rendered":"<section class=\"gb-container gb-container-ba2e2dcb\">\n<div class=\"yoast-breadcrumbs breadcrumb\"><span><span><a href=\"https:\/\/nephcure.org\/\">Home<\/a><\/span> \/ <span><a href=\"https:\/\/nephcure.org\/managing-rkd\/\">Managing RKD<\/a><\/span> \/ <span><a href=\"https:\/\/nephcure.org\/managing-rkd\/treatment-options\/\">Treatment Options<\/a><\/span> \/ <span class=\"breadcrumb_last\" aria-current=\"page\">FILSPARI\u00ae (Sparsentan) for FSGS<\/span><\/span><\/div>\n\n<div class=\"gb-container gb-container-80071c84 hero-copy\">\n\n<h1 class=\"gb-headline gb-headline-6cf43bd0 gb-headline-text hero-content\"><strong>FILSPARI\u00ae<\/strong> (sparsentan) for FSGS<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Sparsentan is an oral medication used to protect the kidneys in certain types of focal segmental glomerulosclerosis (FSGS) and IgA nephropathy (IgAN).&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In FSGS, sparsentan is used to lower the protein leaking into the urine. Sparsentan is FDA approved for the treatment of FSGS (without nephrotic syndrome) in children ages 8 and up and in adults.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Medically reviewed by Dr. Miriam Chung, MD<\/em><br><\/p>\n\n<\/div>\n<\/section>\n\n<div class=\"gb-container gb-container-a6126eda\">\n\n<figure class=\"gb-block-image gb-block-image-40625f55\"><img loading=\"lazy\" decoding=\"async\" width=\"54\" height=\"4\" class=\"gb-image gb-image-40625f55\" src=\"https:\/\/nephcure.org\/wp-content\/uploads\/2023\/11\/heading-line.svg\" alt=\"\" title=\"heading-line\"\/><\/figure>\n\n\n\n<h2 class=\"gb-headline gb-headline-88096344 gb-headline-text\"><strong>How Does <strong>FILSPARI\u00ae<\/strong> Work?<\/strong><\/h2>\n\n\n\n<p class=\"gb-headline gb-headline-fb79fb92 gb-headline-text\">Sparsentan does not suppress the body\u2019s immune system. It works by blocking two signals in the body called endothelin and angiotensin II. These signals are involved in controlling blood pressure and can cause chronic damage to the kidney filters.&nbsp; Blocking these signals can help to reduce damage to the kidney\u2019s filters.<\/p>\n\n\n<div class=\"gb-container gb-container-626eb763\"><\/div>\n\n\n<figure class=\"gb-block-image gb-block-image-a1107d80\"><img loading=\"lazy\" decoding=\"async\" width=\"54\" height=\"4\" class=\"gb-image gb-image-a1107d80\" src=\"https:\/\/nephcure.org\/wp-content\/uploads\/2023\/11\/heading-line.svg\" alt=\"\" title=\"heading-line\"\/><\/figure>\n\n\n\n<h2 class=\"gb-headline gb-headline-3de92b95 gb-headline-text\"><strong>How is the medication administered?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">It is a once-a-day tablet taken orally.<\/p>\n\n\n\n<figure class=\"gb-block-image gb-block-image-50d19bc8\"><img loading=\"lazy\" decoding=\"async\" width=\"54\" height=\"4\" class=\"gb-image gb-image-50d19bc8\" src=\"https:\/\/nephcure.org\/wp-content\/uploads\/2023\/11\/heading-line.svg\" alt=\"\" title=\"heading-line\"\/><\/figure>\n\n\n\n<h2 class=\"gb-headline gb-headline-31e1b116 gb-headline-text\"><strong><strong>Is the medication right for me?<\/strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sparsentan is FDA approved for FSGS without nephrotic syndrome. You should talk to your nephrologist to see if sparsentan is right for you, even if you have had nephrotic syndrome in the past.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sparsentan may not be right for you in certain cases. For example, sparsentan should NOT be taken if you\u2019re pregnant or planning to get pregnant, as it can cause serious birth defects.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>*Note: The decision to prescribe a medication is the responsibility of your physician\/primary care provider based on his\/her evaluation of your condition. The above is meant for informational purposes only. Discuss this information and all information about drugs\/medications with your physician before starting or stopping any medication.<\/em><\/p>\n\n<\/div>\n\n<div class=\"gb-container gb-container-80f48e60\">\n\n<figure class=\"gb-block-image gb-block-image-4b726bff\"><img loading=\"lazy\" decoding=\"async\" width=\"54\" height=\"4\" class=\"gb-image gb-image-4b726bff\" src=\"https:\/\/nephcure.org\/wp-content\/uploads\/2023\/11\/heading-line.svg\" alt=\"\" title=\"heading-line\"\/><\/figure>\n\n\n\n<h2 class=\"gb-headline gb-headline-bff6dfde gb-headline-text\">Frequently Asked Questions<\/h2>\n\n\n<div class=\"gb-container gb-container-3f003111 gb-accordion\">\n<div class=\"gb-container gb-container-68f0eaa5 gb-accordion__item\" data-transition=\"slide\">\n\n<button class=\"gb-button gb-button-d702eeea gb-accordion__toggle\" id=\"gb-accordion-toggle-d702eeea\"><span class=\"gb-button-text\"><strong><strong><strong>What do studies show regarding the medication\u2019s effectiveness in FSGS?<\/strong><\/strong><\/strong><\/span><span class=\"gb-icon\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\" width=\"1em\" height=\"1em\" ariahidden=\"true\" role=\"img\" class=\"gb-accordion__icon\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\" fill=\"currentColor\"><\/path><\/svg><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\" width=\"1em\" height=\"1em\" ariahidden=\"true\" role=\"img\" class=\"gb-accordion__icon-open\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\" fill=\"currentColor\"><\/path><\/svg><\/span><\/button>\n\n\n<div id=\"gb-accordion-content-2b8161d3\" class=\"gb-accordion__content\"><div class=\"gb-container gb-container-2b8161d3\">\n\n<p class=\"wp-block-paragraph\">The DUPLEX trial showed ~50% reduction in urine protein with sparsentan compared to ~32% reduction with irbesartan at 108 weeks.\u00a0 Patients taking sparsentan had similar rate of kidney function loss (or eGFR decrease) as those taking irbesartan at 108 weeks.<\/p>\n\n<\/div><\/div>\n<\/div>\n\n<div class=\"gb-container gb-container-2fcf7640 gb-accordion__item\" data-transition=\"slide\">\n\n<button class=\"gb-button gb-button-69efb835 gb-accordion__toggle\" id=\"gb-accordion-toggle-69efb835\"><span class=\"gb-button-text\"><strong><strong>Is sparsentan safe?&nbsp;<\/strong><\/strong><\/span><span class=\"gb-icon\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\" width=\"1em\" height=\"1em\" ariahidden=\"true\" role=\"img\" class=\"gb-accordion__icon\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\" fill=\"currentColor\"><\/path><\/svg><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\" width=\"1em\" height=\"1em\" ariahidden=\"true\" role=\"img\" class=\"gb-accordion__icon-open\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\" fill=\"currentColor\"><\/path><\/svg><\/span><\/button>\n\n\n<div id=\"gb-accordion-content-7a4bb49d\" class=\"gb-accordion__content\"><div class=\"gb-container gb-container-7a4bb49d\">\n\n<p class=\"wp-block-paragraph\">Sparsentan should NOT be taken if you\u2019re pregnant or planning to get pregnant, as can cause serious birth defects.&nbsp; You will also need a blood test to monitor liver function before and regularly during treatment.&nbsp; Because of these risks, sparsentan is only available through a special program called REMS. REMS stands for Risk Evaluation and Mitigation Strategy. This safety program helps your care team monitor your treatment progress and any potential side effects, while making sure the benefits to protecting your kidneys outweigh any potential risks.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>*Note: The decision to prescribe a medication is the responsibility of your physician\/medical team based on their evaluation of your condition. The above is meant for informational purposes only. Discuss this information and all information about drugs\/medications with your physician before starting or stopping any medication.<\/em><\/p>\n\n<\/div><\/div>\n<\/div>\n\n<div class=\"gb-container gb-container-b63bf464 gb-accordion__item\" data-transition=\"slide\">\n\n<button class=\"gb-button gb-button-73f6aef7 gb-accordion__toggle\" id=\"gb-accordion-toggle-73f6aef7\"><span class=\"gb-button-text\"><strong><strong><strong><strong>What is the difference between sparsentan<\/strong> <strong>and other treatments commonly used to treat FSGS?<\/strong><\/strong><\/strong><\/strong><\/span><span class=\"gb-icon\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\" width=\"1em\" height=\"1em\" ariahidden=\"true\" role=\"img\" class=\"gb-accordion__icon\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\" fill=\"currentColor\"><\/path><\/svg><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\" width=\"1em\" height=\"1em\" ariahidden=\"true\" role=\"img\" class=\"gb-accordion__icon-open\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\" fill=\"currentColor\"><\/path><\/svg><\/span><\/button>\n\n\n<div id=\"gb-accordion-content-18593c49\" class=\"gb-accordion__content\"><div class=\"gb-container gb-container-18593c49\">\n\n<p class=\"wp-block-paragraph\">Unlike some of the other treatments commonly used to treat FSGS, sparsentan is not an immuno-suppressive medication.\u00a0 Other medications for FSGS such as ACE-inhibitors (ACEi) or Angiotensin-receptor-blockers (ARB) also interfere with angiotensin II; so it is important to stop ACEi or ARB if taking sparsentan.<\/p>\n\n<\/div><\/div>\n<\/div>\n\n<div class=\"gb-container gb-container-891be434 gb-accordion__item\" data-transition=\"slide\">\n\n<button class=\"gb-button gb-button-c174e2a1 gb-accordion__toggle\" id=\"gb-accordion-toggle-c174e2a1\"><span class=\"gb-button-text\"><strong><strong><strong><strong>How do I get sparsentan?<\/strong>&nbsp; <\/strong><\/strong><\/strong><\/span><span class=\"gb-icon\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\" width=\"1em\" height=\"1em\" ariahidden=\"true\" role=\"img\" class=\"gb-accordion__icon\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\" fill=\"currentColor\"><\/path><\/svg><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\" width=\"1em\" height=\"1em\" ariahidden=\"true\" role=\"img\" class=\"gb-accordion__icon-open\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\" fill=\"currentColor\"><\/path><\/svg><\/span><\/button>\n\n\n<div id=\"gb-accordion-content-a3770df8\" class=\"gb-accordion__content\"><div class=\"gb-container gb-container-a3770df8\">\n\n<p class=\"wp-block-paragraph\">Sparsentan can be ordered by your nephrologist, and is only available through the FILSPARI REMS program.<\/p>\n\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n<div class=\"gb-container gb-container-0d21e4ac\">\n<div class=\"gb-grid-wrapper gb-grid-wrapper-3d338a55\">\n<div class=\"gb-grid-column gb-grid-column-296a2c84\"><div class=\"gb-container gb-container-296a2c84\">\n<div class=\"gb-container gb-container-eb83049f\">\n\n<h2 class=\"gb-headline gb-headline-5127a4de gb-headline-text\">Find a Specialist<\/h2>\n\n\n\n<p class=\"gb-headline gb-headline-00d5119d gb-headline-text\">It is important to work with a nephrologist who specializes in rare kidney disease (RKD) and can provide personalized advice based on your individual health needs and changes in available treatments. NephCure has a curated list of NephCure Specialists nationwide ready to help you.<\/p>\n\n<\/div>\n\n<div class=\"gb-container gb-container-54aa31c0\"><a class=\"gb-container-link\" href=\"https:\/\/nephcure.org\/managing-rkd\/find-a-specialist\/\"><\/a>\n\n<p class=\"gb-headline gb-headline-38137575\"><span class=\"gb-icon\"><svg fill=\"none\" viewBox=\"0 0 27 24\" height=\"24\" width=\"27\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"> <path fill=\"#00556B\" d=\"M26.0607 13.0607C26.6464 12.4749 26.6464 11.5251 26.0607 10.9393L16.5147 1.3934C15.9289 0.807611 14.9792 0.807611 14.3934 1.3934C13.8076 1.97919 13.8076 2.92893 14.3934 3.51472L22.8787 12L14.3934 20.4853C13.8076 21.0711 13.8076 22.0208 14.3934 22.6066C14.9792 23.1924 15.9289 23.1924 16.5147 22.6066L26.0607 13.0607ZM0 13.5H25V10.5H0V13.5Z\"><\/path> <\/svg><\/span><\/p>\n\n<\/div>\n<\/div><\/div>\n\n<div class=\"gb-grid-column gb-grid-column-00512214\"><div class=\"gb-container gb-container-00512214\">\n<div class=\"gb-container gb-container-178632bb\">\n\n<h2 class=\"gb-headline gb-headline-74b009b0 gb-headline-text\">Clinical Trials<\/h2>\n\n\n\n<p class=\"has-secondary-lighter-gray-color has-text-color has-link-color wp-elements-1 wp-block-paragraph\">From accessing cutting-edge treatments to being part of groundbreaking research, discover the benefits that can make a real difference. Learn more about clinical trials currently taking place, and find opportunities near you.<\/p>\n\n<\/div>\n\n<div class=\"gb-container gb-container-e263f928\"><a class=\"gb-container-link\" href=\"https:\/\/nephcure.org\/managing-rkd\/clinical-trials\/\"><\/a>\n\n<p class=\"gb-headline gb-headline-7dbd95e4\"><span class=\"gb-icon\"><svg fill=\"none\" viewBox=\"0 0 27 24\" height=\"24\" width=\"27\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"> <path fill=\"#00556B\" d=\"M26.0607 13.0607C26.6464 12.4749 26.6464 11.5251 26.0607 10.9393L16.5147 1.3934C15.9289 0.807611 14.9792 0.807611 14.3934 1.3934C13.8076 1.97919 13.8076 2.92893 14.3934 3.51472L22.8787 12L14.3934 20.4853C13.8076 21.0711 13.8076 22.0208 14.3934 22.6066C14.9792 23.1924 15.9289 23.1924 16.5147 22.6066L26.0607 13.0607ZM0 13.5H25V10.5H0V13.5Z\"><\/path> <\/svg><\/span><\/p>\n\n<\/div>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n<div class=\"gb-container gb-container-42105b23 news-letter-sec alignfull\">\n\n<figure class=\"gb-block-image gb-block-image-b3f3ccb8\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"120\" class=\"gb-image gb-image-b3f3ccb8\" src=\"https:\/\/nephcure.org\/wp-content\/uploads\/2023\/11\/purple-curve.svg\" alt=\"\" title=\"purple-curve\"\/><\/figure>\n\n\n<div class=\"gb-container gb-container-41717e70 alignwide\">\n\n<h2 class=\"gb-headline gb-headline-1760ac29 gb-headline-text\">Sign up to get NephCure\u2019s latest updates.<\/h2>\n\n\n\n<a class=\"gb-button gb-button-753f318a gb-button-text gb-button-primary button\" href=\"\/newsletter\/\">SIGN UP<\/a>\n\n\n<div class=\"gb-container gb-container-2b968bcb news-letter-field\">\n    <script type=\"text\/javascript\">\n    jQuery(document).ready(function($) {\n        const disposableDomains = [\n            'mailinator.com', 'yopmail.com', 'tempmail.com', 'guerrillamail.com',\n            'throwawaymail.com', 'fakeinbox.com', 'trashmail.com', 'sharklasers.com',\n            'tempinbox.com', '10minutemail.com'\n        ];\n        const majorProviders = [\n            'gmail.com', 'yahoo.com', 'hotmail.com', 'outlook.com',\n            'aol.com', 'icloud.com', 'protonmail.com'\n        ];\n        const suspiciousUsernames = [\n            'test', 'example', 'user', 'admin', 'info', 'mail', 'email',\n            'noreply', 'no-reply', 'donotreply', 'do-not-reply', 'fake',\n            'abc', '123', 'xyz', 'asdf', 'qwerty', 'demo', 'sample',\n            'spam', 'temp', 'dummy', 'foobar', 'anonymous', 'disposable'\n        ];\n        const keyboardPatterns = ['qwerty', 'asdfgh', 'zxcvbn', '123456'];\n\n        function isValidEmailFormat(email) {\n            const regex = \/^[^\\s@]+@[^\\s@]+\\.[^\\s@]+$\/;\n            return regex.test(email);\n        }\n\n        function hasSuspiciousPattern(username) {\n            if (suspiciousUsernames.includes(username)) return true;\n            if (username.length <= 2) return true;\n            if (\/^(.)\\1{3,}$\/.test(username)) return true;\n            for (const pattern of keyboardPatterns) {\n                if (username.includes(pattern)) return true;\n            }\n            return false;\n        }\n\n        function usernameMatchesDomain(username, domain) {\n            const domainBase = domain.split('.')[0];\n            return username === domainBase;\n        }\n\n        $('.ginput_container_email input').on('blur', function() {\n            const emailField = $(this);\n            const email = emailField.val().trim().toLowerCase();\n            const errorContainer = emailField.siblings('.validation_message');\n\n            \/\/ Clear any previous messages\n            if (errorContainer.length) errorContainer.remove();\n            emailField.removeClass('gfield_error gfield_warning');\n\n            if (email === '') return;\n\n            const username = email.substring(0, email.lastIndexOf('@'));\n            const domain = email.substring(email.lastIndexOf('@') + 1);\n\n            if (!isValidEmailFormat(email)) {\n                emailField.after('<div class=\"validation_message\">Please enter a valid email address.<\/div>');\n                emailField.addClass('gfield_error');\n                return;\n            }\n\n            if (disposableDomains.includes(domain)) {\n                emailField.after('<div class=\"validation_message\">Disposable email addresses are not allowed.<\/div>');\n                emailField.addClass('gfield_error');\n                return;\n            }\n\n            if (usernameMatchesDomain(username, domain)) {\n                emailField.after('<div class=\"validation_message\">This email looks suspicious (username matches domain). 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