Patient Support
Prescribing Information, including Boxed Warning
Medication Guide

\n","direction","ltr","isOnePager","header",{"_41":396,"_397":398,"_399":400,"_418":419,"_551":552,"_567":568},"default","searchPageUrl","/en/search-result","actions",[401,406,409],{"_41":42,"_402":403,"_46":404,"_43":405,"_380":16},"target","_blank","https://www.news.sanofi.us/","Media",{"_41":42,"_402":403,"_46":407,"_43":408,"_380":16},"https://www.sanofi.com/en/investors","Investor Relations",{"_41":42,"_402":403,"_46":410,"_43":411,"_380":16,"_412":413},"https://www.sanofi.us/en/careers","Careers","gtmPayload",{"_414":415,"_141":410,"_416":417},"event","outbound_link","interaction_type","Navigation_Header_Link_Career","navigation",[420,476,487,548],{"_41":421,"_422":423,"_426":427},"nav-item-node","self",{"_41":42,"_46":424,"_43":425},"/en/our-company","Our Company","items",[428,431,445,473],{"_41":42,"_402":403,"_46":429,"_43":430,"_380":16},"https://www.sanofi.com/en/our-company/our-strategy","Our Strategy",{"_41":421,"_422":432,"_426":435},{"_41":42,"_46":433,"_43":434},"/en/our-company/governance","Governance",[436,439,442],{"_41":42,"_46":437,"_43":438},"/en/our-company/governance/us-leadership","U.S. Leadership",{"_41":42,"_46":440,"_43":441},"/en/our-company/governance/us-corporate-compliance","U.S. Corporate Compliance",{"_41":42,"_46":443,"_43":444},"/en/our-company/governance/state-disclosure","State Disclosure",{"_41":421,"_422":446,"_426":449},{"_41":42,"_46":447,"_43":448},"/en/our-company/social-impact","Social Impact",[450,453,464,467,470],{"_41":42,"_46":451,"_43":452},"/en/our-company/social-impact/corporate-social-responsibility","Corporate Social Responsibility",{"_41":421,"_422":454,"_426":457},{"_41":42,"_46":455,"_43":456},"/en/our-company/social-impact/inclusion","Inclusion",[458,461],{"_41":42,"_46":459,"_43":460},"/en/our-company/social-impact/inclusion/employee-resource-groups","Employee Business Resource Groups",{"_41":42,"_46":462,"_43":463},"/en/our-company/social-impact/inclusion/a-million-conversations-addressing-disparities-in-healthcare"," A Million Conversations: Addressing Disparities in Healthcare",{"_41":42,"_46":465,"_43":466},"/en/our-company/social-impact/health-equity-at-sanofi-in-the-us","Health Equity at Sanofi in the US",{"_41":42,"_46":468,"_43":469},"/en/our-company/social-impact/patient-advocacy","Patient Advocacy",{"_41":42,"_46":471,"_43":472},"/en/our-company/social-impact/responsible-business-values","Responsible Business Values",{"_41":42,"_402":403,"_46":474,"_43":475,"_380":16},"https://www.sanofi.com/en/our-company/our-legacy","Our Legacy",{"_41":421,"_422":477,"_402":403,"_380":16,"_426":480},{"_41":42,"_402":403,"_46":478,"_43":479,"_380":16},"https://www.sanofi.com/en/our-science","Our Science",[481,484],{"_41":42,"_402":403,"_46":482,"_43":483,"_380":16},"https://www.sanofi.com/en/our-science/our-pipeline","Our Pipeline",{"_41":42,"_402":403,"_46":485,"_43":486,"_380":16},"https://www.sanofi.com/en/clinical-trials","Clinical Trials and Results",{"_41":421,"_422":488,"_426":489},{"_41":42,"_46":383,"_43":384},[490,501,530,542,545],{"_41":421,"_422":491,"_426":494},{"_41":42,"_46":492,"_43":493},"/en/your-health/vaccines","Vaccines",[495,498],{"_41":42,"_46":496,"_43":497},"/en/your-health/vaccines/influenza","Influenza",{"_41":42,"_46":499,"_43":500},"/en/your-health/vaccines/respiratory-syncytial-virus","Respiratory Syncytial Virus",{"_41":421,"_422":502,"_426":505},{"_41":42,"_46":503,"_43":504},"/en/your-health/medicines","Medicines",[506,509,512,515,518,521,524,527],{"_41":42,"_46":507,"_43":508},"/en/your-health/medicines/immunology","Immunology",{"_41":42,"_46":510,"_43":511},"/en/your-health/medicines/neurology","Neurology",{"_41":42,"_46":513,"_43":514},"/en/your-health/medicines/oncology","Oncology",{"_41":42,"_46":516,"_43":517},"/en/your-health/medicines/rare-blood-disorders","Rare Blood Disorders",{"_41":42,"_46":519,"_43":520},"/en/your-health/medicines/rare-diseases","Rare Diseases",{"_41":42,"_46":522,"_43":523},"/en/your-health/medicines/cardiovascular-disease","Cardiovascular Disease",{"_41":42,"_46":525,"_43":526},"/en/your-health/medicines/diabetes","Diabetes",{"_41":42,"_46":528,"_43":529},"/en/your-health/medicines/transplant","Transplant",{"_41":421,"_422":531,"_426":532},{"_41":42,"_46":386,"_43":387},[533,536,539],{"_41":42,"_46":534,"_43":535},"/en/your-health/products/prescription-products","Prescription Products",{"_41":42,"_46":537,"_43":538},"/en/your-health/products/vaccine-products","Vaccine Products",{"_41":42,"_402":403,"_46":540,"_43":541,"_380":16},"https://www.winthropus.com/products","Generics",{"_41":42,"_46":543,"_43":544},"/en/your-health/patient-support","Patient Support",{"_41":42,"_402":403,"_46":546,"_43":547,"_380":16},"https://www.sanofi.com/en/your-health/healthcare-professional-support","Healthcare Professional Support",{"_41":42,"_402":403,"_46":549,"_43":550,"_380":16},"https://www.sanofi.com/en/partnering","Partner With Us","headerActions",[553],{"_41":554,"_141":555,"_43":556,"_402":557,"_355":555,"_558":559,"_380":16,"_560":357,"_561":562,"_412":563},"external","https://www.sanofi.com/en/chasing-miracles ","Chasing Miracles","_self","icon","fasArrowUpRightFromSquare","outgoingModalVariation","mgnlId","f14b6ea0-59b0-4806-bf00-0e8d24c8381d",{"_414":415,"_141":564,"_565":566},"US to Campaign Hub","Interaction_type","CTA_US_toCM","motionToggle",{"_569":381},"motionActive","footer",{"_41":396,"_572":573,"_574":575,"_594":595},"copyright",[83],"informations",[576,579,582,585,588,591],{"_41":42,"_46":577,"_43":578},"/en/sanofi-today","Sanofi Today",{"_41":42,"_46":580,"_43":581,"_380":16},"https://www.sanofi.com/en/sanofi-us-privacy-policies","Privacy Policy",{"_41":42,"_46":583,"_43":584},"/en/consumer-health-data-privacy-policy","Consumer Health Data Privacy Policy",{"_41":42,"_46":586,"_43":587},"/en/legal-notice","Legal Notice",{"_41":42,"_46":589,"_43":590},"/en/contact-us","Contact Us",{"_41":42,"_46":592,"_43":593},"/en/sitemap","Sitemap","social",[596,602,607,612,617],{"_41":42,"_46":597,"_43":598,"_355":599,"_558":600,"_601":554},"https://www.facebook.com/sanofiUS","Go to Sanofi U.S. on Facebook","Sanofi U.S. on Facebook","facebook","domain",{"_41":42,"_46":603,"_43":604,"_355":605,"_558":606,"_601":554},"http://www.twitter.com/SanofiUS","Go to Sanofi U.S. on X (Twitter)","Sanofi U.S. on X (Twitter)","twitter",{"_41":42,"_46":608,"_43":609,"_355":610,"_558":611,"_601":554},"https://www.linkedin.com/company/sanofi/","Go to Sanofi on Linkedin","Sanofi on Linkedin","linkedin",{"_41":42,"_46":613,"_43":614,"_355":615,"_558":616,"_601":554},"https://www.tiktok.com/@sanofi","Go to Sanofi on TikTok","Sanofi on TikTok","tiktok",{"_41":42,"_46":618,"_43":619,"_355":620,"_558":621,"_601":554},"https://www.youtube.com/@SanofiUS","Go to Sanofi US on YouTube","Sanofi US on YouTube","youtube",[623],{"_41":42,"_43":44,"_45":6,"_46":47},"blocks",[],"links",[],"seo",{"_630":631,"_639":640,"_647":648,"_606":652,"_655":656},"sitemap",{"_632":16,"_633":634,"_635":636,"_637":638},"visible","lastModified","2026-04-14","changeFrequency","weekly","priority","0.5","meta",{"_355":366,"_641":642,"_643":644,"_645":646},"description","Patient Support \t Prescribing Information , including Boxed Warning \t Medication Guide","keywords",[],"canonicalUrl","https://www.sanofi.us/en/your-health/products/lemtrada","opengraph",{"_41":649,"_355":366,"_641":642,"_141":646,"_650":651},"article","image","https://www.sanofi.us/assets/dot-us/pages/images/Your-Health/your-health/products/prescribtion-products/Lemtrada_logo-370x250_20240229162855.jpeg",{"_653":654,"_355":366,"_641":642,"_141":646,"_650":651},"card","summary","metaCustom",[],"action",{"_43":366,"_356":390,"_650":659},"/assets/dot-us/pages/images/Your-Health/your-health/products/prescribtion-products/Lemtrada_logo-370x250_20240229162855.jpeg","actionData","errors"]

LEMTRADA® (alemtuzumab) support