R.A.R.E.® can help*

R.A.R.E. (Recordati Access, Resources, and Engagement) is designed to make it easier for you to access and stay on treatment.

  • Co-pay assistance

  • Insurance support

  • Prior authorization and appeals support for your doctor’s office

Contact the R.A.R.E. Patient Support Program
Monday-Friday, 9 AM to 5 PM ET
Phone: 1-855-299-8844
Fax: 1-888-223-1746

*Eligibility requirements apply

Two iMCD patients stand back to back to represent the support of Patient Connect.
Not actual patients

If you are prescribed SYLVANT, R.A.R.E. can help connect you with a variety of resources:

Insurance Support

  • Insurance verification—Determining whether your insurance company will cover SYLVANT and help with understanding your insurance benefits for SYLVANT
  • Prior Authorizations/Appeals—Help work with your doctor’s office and insurance company if additional approvals are needed

Financial assistance

  • Co-pay assistance program—Check if you’re eligible to participate and enroll in the co-pay program
  • Patient Assistance Program (PAP)—Help you access SYLVANT if you’re an eligible patient who doesn’t have insurance or is underinsured
  • Additional referrals—Refer you to outside assistance sources if appropriate

Advocacy groups

The Castleman Disease Collaborative Network (CDCN) is a global initiative dedicated to accelerating research and treatment for Castleman disease.

Castleman disease logo

The National Organization for Rare Disorders (NORD) is a patient advocacy organization dedicated to individuals with rare diseases and the organizations that serve them.

National Organization for Rare Disorders logo

Global Genes was established to connect, empower, and inspire the rare disease community.

Global Genes logo

RareConnect is a place where patients with rare diseases can connect with others globally.

RareConnect logo
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SYLVANT® (siltuximab) for injection

APPROVED USE

SYLVANT® (siltuximab) is a prescription medicine used to treat people with multicentric Castleman’s disease (MCD) who do not have human immunodeficiency virus (HIV) and human herpesvirus-8 (HHV-8) infection.

It is not known if SYLVANT is safe and effective in children.

IMPORTANT SAFETY INFORMATION

Do not take SYLVANT if you have had a severe allergic reaction to siltuximab or any of the ingredients in SYLVANT. See the Patient Information for SYLVANT for a complete list of ingredients.

SYLVANT® (siltuximab) for injection

APPROVED USE

SYLVANT® (siltuximab) is a prescription medicine used to treat people with multicentric Castleman’s disease (MCD) who do not have human immunodeficiency virus (HIV) and human herpesvirus-8 (HHV-8) infection.

It is not known if SYLVANT is safe and effective in children.

IMPORTANT SAFETY INFORMATION

Do not take SYLVANT if you have had a severe allergic reaction to siltuximab or any of the ingredients in SYLVANT. See the Patient Information for SYLVANT for a complete list of ingredients.

Tell your healthcare provider if you have an infection. You should not receive SYLVANT if you have a severe infection.

Tell your healthcare provider if you have had a recent vaccination or are scheduled to receive any vaccinations. You should not receive a live vaccine during your treatment with SYLVANT.

Tell your healthcare provider if you are pregnant or plan to become pregnant. It is not known if SYLVANT will harm your unborn baby. You should not become pregnant while receiving treatment with SYLVANT. Females who are able to become pregnant should use effective birth control during treatment with SYLVANT and for 3 months after stopping treatment.

Tell your healthcare provider if you are breastfeeding or plan to breastfeed. It is not known if SYLVANT passes into your breast milk. You and your healthcare provider should decide if you will take SYLVANT or breastfeed. You should not do both.

Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.

The most common side effects of SYLVANT include rash, itching, upper respiratory tract infection, swelling, weight gain, and increased blood level of uric acid.

These are not all the possible side effects of SYLVANT. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

For more information, please see the full Prescribing Information.