{"id":43,"date":"2024-11-18T12:22:17","date_gmt":"2024-11-18T12:22:17","guid":{"rendered":"https:\/\/www.naglazyme.com\/en-us\/?page_id=43"},"modified":"2026-04-01T15:47:26","modified_gmt":"2026-04-01T15:47:26","slug":"safety-information","status":"publish","type":"page","link":"https:\/\/www.naglazyme.com\/en-us\/safety-information\/","title":{"rendered":"safety information"},"content":{"rendered":"
\n
\n
\n \n
\n

NAGLAZYME\u00ae<\/sup> (galsulfase) safety information<\/h1>\n

With all medications, there is a chance of side effects. This is true of NAGLAZYME\u00ae<\/sup> (galsulfase) too.1<\/sup><\/strong><\/p>\n

Possible allergic reactions<\/h2>\n

Severe and life\u2010threatening allergic reactions, including anaphylaxis, can occur during NAGLAZYME infusions and up to 24 hours after infusion. Allergic reactions can occur in people receiving NAGLAZYME for the first time or in people who have previously received NAGLAZYME without having an allergic reaction. Typical signs of an allergic reaction include shock, difficulty breathing, wheezing, swelling of the throat, and low blood pressure. If a severe allergic reaction occurs during infusion, the infusion should be stopped immediately and you should receive medical attention. Contact your doctor or get medical help right away if you develop any severe symptoms after infusion.1<\/sup><\/p>\n

Infusion\u2010associated reactions<\/h2>\n

Because NAGLAZYME is given by infusion, there are reactions that may happen as a result of the infusion. In clinical trials, some people experienced serious and severe infusion reactions like hives, chest pain, rash, abdominal pain, difficulty breathing, swelling, fever, and eye irritation. You should receive medication such as antihistamines before NAGLAZYME infusions to reduce the risk of infusion\u2010associated reactions.1<\/sup><\/p>\n

If an infusion\u2010associated reaction occurs, the infusion should be slowed or stopped and you may be given additional medication. For most patients, these problems went away when the infusion was stopped or slowed down. In some cases, patients were given another medicine, such as an antihistamine or pain reliever, to help.1<\/sup><\/p>\n

Side effects<\/h2>\n

In clinical studies, the most common side effects of NAGLAZYME were rash, pain, hives, fever, itching, chills, headache, nausea, vomiting, abdominal pain, and difficulty breathing. The most common side effects requiring medical attention are infusion\u2010associated reactions.1<\/sup><\/p>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n

\n
\n
\n \n
\n

Infusion\u2010associated reactions<\/h2>\n

Despite routine pretreatment with antihistamines, infusion\u2010associated reactions, some severe, occurred in 33 of 59 patients treated with NAGLAZYME. The most common symptoms of drug\u2010related infusion\u2010associated reactions were fever, chills, rash, urticaria, dyspnea, nausea, vomiting, pruritus, erythema, abdominal pain, hypertension, and headache. Respiratory distress, chest pain, hypotension, angioedema, conjunctivitis, tremor, and cough were also reported. Infusion\u2010associated reactions began as early as week 1 and as late as week 146 of NAGLAZYME treatment.1<\/sup><\/p>\n

Symptoms typically abated with slowing or temporary interruption of the infusion and administration of additional antihistamines, antipyretics, and occasionally corticosteroids. Most patients were able to complete their infusions. Subsequent infusions were managed with a slower rate of NAGLAZYME administration, treatment with additional prophylactic antihistamines, and, in the event of a more severe reaction, treatment with prophylactic corticosteroids. Twenty\u2010three of 33 patients (70%) experienced recurrent infusion\u2010associated reactions during multiple infusions, although not always in consecutive weeks.1<\/sup><\/p>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n

\n
\n
\n \n
\n

Adverse events<\/h2>\n

The most common serious adverse events related to the use of NAGLAZYME occurred during infusions and included apnea, fever, and respiratory distress. Severe adverse events included chest pain, dyspnea, laryngeal edema, and conjunctivitis. The most common adverse events in clinical studies were rash, pain, urticaria, fever, pruritus, chills, headache, nausea, vomiting, abdominal pain, and dyspnea. The most common adverse events requiring interventions are infusion\u2010associated reactions.1<\/sup><\/p>\n

The table below enumerates adverse events reported during the 6\u2010month placebo\u2010controlled trial that occurred more frequently in the NAGLAZYME group than in the placebo group. Each event listed occurred in at least 2 more patients treated with NAGLAZYME than in placebo\u2010treated patients. Observed adverse events in the phase 1, phase 2, and open\u2010label extension studies were not different in nature or severity.1<\/sup><\/p>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n

\n
\n
\n \n
\n

Immune\u2010mediated reactions<\/h2>\n

Type III immune complex\u2013mediated reactions have been observed with NAGLAZYME, as with other enzyme replacement therapies. If immune\u2010mediated reactions occur, initiate appropriate medical treatment and consider discontinuation of NAGLAZYME. The risks and benefits of readministering NAGLAZYME following an immune\u2010mediated reaction should be considered. Some patients have successfully continued to receive NAGLAZYME under close clinical supervision.1<\/sup><\/p>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n

\n
\n
\n \n
\n

List of adverse events recorded during the primary trial of NAGLAZYME1<\/sup><\/h3>\n <\/div>\n\n\n
<\/th>NAGLAZYME(galsulfase)(n=19)<\/code><\/mark><\/strong><\/span><\/th>Placebo (n=20*)<\/mark><\/strong><\/span><\/th><\/tr><\/thead>
Adverse Event<\/strong><\/td>Patients, n(%)<\/strong><\/td>Patients, n(%)<\/strong><\/td><\/tr>
All<\/td>19 (100)<\/td>20 (100)<\/td><\/tr>
Abdominal Pain<\/td>9 (47)<\/td>7 (35)<\/td><\/tr>
Ear Pain<\/td>8 (42)<\/td>4 (20)<\/td><\/tr>
Joint Pain<\/td>8 (42)<\/td>5 (25)<\/td><\/tr>
Pain<\/td>6 (32)<\/td>1 (5)<\/td><\/tr>
Conjunctivitis<\/td>4 (21)<\/td>0<\/td><\/tr>
Difficulty Breathing<\/td>4 (21)<\/td>2 (10)<\/td><\/tr>
Rash<\/td>4 (21)<\/td>2 (10)<\/td><\/tr>
Chills<\/td>4 (21)<\/td>0<\/td><\/tr>
Chest Pain<\/td>3 (16)<\/td>1 (5)<\/td><\/tr>
Sore Throat<\/td>2 (11)<\/td>0<\/td><\/tr>
Absence of Reflexes<\/td>2 (11)<\/td>0<\/td><\/tr>
Corneal Opacity<\/td>2 (11)<\/td>0<\/td><\/tr>
Stomach Flu<\/td>2 (11)<\/td>0<\/td><\/tr>
Hypertension<\/td>2 (11)<\/td>0<\/td><\/tr>
Malaise<\/td>2 (11)<\/td>0<\/td><\/tr>
Nasal Congestion<\/td>2 (11)<\/td>0<\/td><\/tr>
Umbilical Hernia<\/td>2 (11)<\/td>0<\/td><\/tr>
Hearing Impairment<\/td>2 (11)<\/td>0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n <\/div>\n <\/div>\n<\/div>\n\n
\n
\n
\n \n
\n

*One of the 20 patients in the placebo group dropped out after week 4 infusion.1<\/sup><\/small><\/p>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n

\n
\n
\n \n
\n

Warnings and precautions<\/h2>\n

Life\u2010threatening anaphylactic reactions have been observed in some patients during NAGLAZYME infusions and up to 24 hours after infusion. If anaphylaxis or other severe allergic reactions occur, immediately discontinue infusion and initiate appropriate treatment, which may include resuscitation, epinephrine, and administering additional antihistamines, antipyretics, or corticosteroids. Administration of NAGLAZYME should be supervised by a healthcare provider knowledgeable in the management of hypersensitivity reactions including anaphylaxis. Initiate NAGLAZYME in a healthcare setting with appropriate medical monitoring and support measures, including access to cardiopulmonary resuscitation equipment.1<\/sup><\/p>\n

Caution should be exercised when administering NAGLAZYME to patients susceptible to fluid volume overload, because congestive heart failure may result. Appropriate medical support and monitoring measures should be readily available during NAGLAZYME infusion. Some patients may require prolonged observation times.1<\/sup><\/p>\n

Sleep apnea is common in MPS VI patients and antihistamine pretreatment may increase the risk of an apneic episode. Evaluation of airway patency should be considered prior to initiation of treatment. Patients using supplemental oxygen or continuous positive airway pressure (CPAP) during sleep should have these treatments readily available during infusion in the event of an infusion reaction, or extreme drowsiness\/sleep induced by antihistamine use.1<\/sup><\/p>\n

Spinal cord damage may occur due to the natural MPS VI disease process.1<\/sup> Signs of spinal cord injury include back pain, loss of bladder and bowel control, numbness, and paralysis. Contact your doctor immediately if you develop any of these symptoms.1<\/sup><\/p>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n

\n
\n\t\t
\n\t\t \t\t\t

Reference:<\/strong>\n<\/h4>\n\t\t\t\t\t\t
    \n
  1. NAGLAZYME [package insert]. Novato, CA: BioMarin Pharmaceutical Inc; 2024.\n<\/span><\/li>\n <\/ol>\n\t\t\t\t\t<\/div>\n\t<\/div>\n<\/div>\n\n
    \n
    \n
    \n \n
    \n

    NEXT PAGE ><\/strong><\/a><\/p>\n <\/div>\n <\/div>\n <\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-43","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"\nSafety Information | Patient<\/title>\n<meta name=\"description\" content=\"Learn more about the possible side effects of NAGLAZYME\u00ae (galsulfase) treatment.\" \/>\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.naglazyme.com\/en-us\/safety-information\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Safety Information | Patient\" \/>\n<meta property=\"og:description\" content=\"Learn more about the possible side effects of NAGLAZYME\u00ae (galsulfase) treatment.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.naglazyme.com\/en-us\/safety-information\/\" \/>\n<meta property=\"og:site_name\" content=\"BioMarin Naglazyme Patient EN-US\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-01T15:47:26+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.naglazyme.com\\\/en-us\\\/safety-information\\\/\",\"url\":\"https:\\\/\\\/www.naglazyme.com\\\/en-us\\\/safety-information\\\/\",\"name\":\"Safety Information | Patient\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.naglazyme.com\\\/en-us\\\/#website\"},\"datePublished\":\"2024-11-18T12:22:17+00:00\",\"dateModified\":\"2026-04-01T15:47:26+00:00\",\"description\":\"Learn more about the possible side effects of NAGLAZYME\u00ae (galsulfase) treatment.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.naglazyme.com\\\/en-us\\\/safety-information\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.naglazyme.com\\\/en-us\\\/safety-information\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.naglazyme.com\\\/en-us\\\/safety-information\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.naglazyme.com\\\/en-us\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"safety information\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.naglazyme.com\\\/en-us\\\/#website\",\"url\":\"https:\\\/\\\/www.naglazyme.com\\\/en-us\\\/\",\"name\":\"BioMarin Naglazyme Patient EN-US\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.naglazyme.com\\\/en-us\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Safety Information | Patient","description":"Learn more about the possible side effects of NAGLAZYME\u00ae (galsulfase) treatment.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.naglazyme.com\/en-us\/safety-information\/","og_locale":"en_US","og_type":"article","og_title":"Safety Information | Patient","og_description":"Learn more about the possible side effects of NAGLAZYME\u00ae (galsulfase) treatment.","og_url":"https:\/\/www.naglazyme.com\/en-us\/safety-information\/","og_site_name":"BioMarin Naglazyme Patient EN-US","article_modified_time":"2026-04-01T15:47:26+00:00","twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.naglazyme.com\/en-us\/safety-information\/","url":"https:\/\/www.naglazyme.com\/en-us\/safety-information\/","name":"Safety Information | Patient","isPartOf":{"@id":"https:\/\/www.naglazyme.com\/en-us\/#website"},"datePublished":"2024-11-18T12:22:17+00:00","dateModified":"2026-04-01T15:47:26+00:00","description":"Learn more about the possible side effects of NAGLAZYME\u00ae (galsulfase) treatment.","breadcrumb":{"@id":"https:\/\/www.naglazyme.com\/en-us\/safety-information\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.naglazyme.com\/en-us\/safety-information\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.naglazyme.com\/en-us\/safety-information\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.naglazyme.com\/en-us\/"},{"@type":"ListItem","position":2,"name":"safety information"}]},{"@type":"WebSite","@id":"https:\/\/www.naglazyme.com\/en-us\/#website","url":"https:\/\/www.naglazyme.com\/en-us\/","name":"BioMarin Naglazyme Patient EN-US","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.naglazyme.com\/en-us\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/www.naglazyme.com\/en-us\/wp-json\/wp\/v2\/pages\/43","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.naglazyme.com\/en-us\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.naglazyme.com\/en-us\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.naglazyme.com\/en-us\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.naglazyme.com\/en-us\/wp-json\/wp\/v2\/comments?post=43"}],"version-history":[{"count":81,"href":"https:\/\/www.naglazyme.com\/en-us\/wp-json\/wp\/v2\/pages\/43\/revisions"}],"predecessor-version":[{"id":975,"href":"https:\/\/www.naglazyme.com\/en-us\/wp-json\/wp\/v2\/pages\/43\/revisions\/975"}],"wp:attachment":[{"href":"https:\/\/www.naglazyme.com\/en-us\/wp-json\/wp\/v2\/media?parent=43"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}