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An open-label, multicenter extension study to evaluate the safety and tolerability of natalizumab in subjects with multiple sclerosis who have completed studies C-1801, C-1802, or C-1803.

An open-label, multicenter extension study to evaluate the safety and tolerability of natalizumab in subjects with multiple sclerosis who have completed studies C-1801, C-1802, or C-1803.

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
EU CTR
Registry ID
EUCTR2004-000047-18-SE
Enrollment
1900
Registered
2004-06-28
Start date
2004-07-27
Completion date
Unknown
Last updated
2012-03-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Male and female subjects with multiple sclerosis who have completed natalizumab studies C-1801, C-1802, or C-1803

Interventions

Product Name: natalizumab Product Code: AN100226 Pharmaceutical Form: Concentrate for solution for infusion INN or Proposed INN: natalizumab Concentration unit: mg/ml milligram(s)/millilitre Concentra

Sponsors

Biogen Idec Ltd.
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Must give written informed concent. Must be an MS subject who has completed studies C-1801, C-1802, or C-1803 C-1801 subjects must have completed all protocol-required evaluations (through the end of the study), and either remained on study drug for the entire study period or discontinued study drug after experiencing protocol-defined disease progression and chose treatment options specified in the protocol. C-1802 subjects must have completed all protocol-required evaluations (through the end of the study), and either remained on study drug and/or AVONEX for the entire study period or discontinued study drug after experiencing protocol-defined disease progression and chose treatment options specified in the protocol. C-1803 subjects must have completed all protocol-required evaluations (through the end of the study) and remained on the study drug for the entire study period. Are the trial subjects under 18? no Number of subjects for this age range: F.1.2 Adults (18-64 years) yes F.1.2.1 Number of subjects for this age range F.1.3 Elderly (>=65 years) no F.1.3.1 Number of subjects for this age range

Exclusion criteria

Exclusion criteria: History of, or available abnormal laboratory results indicative of, any significant cardiac, endocrinologic, hematologic, immunologic, metabolic, urologic, pulmonary, gastrointestinal, dermantologic, psychiatric (including major depression), renal, and/or other major disease, that would preclude the administration of natalizumab for 24 months. History of malignancy. Histroy of severe allergic or anaphylactic reactions or known drug hypersensitivity. A significant change (as determined by the Investigator) in the subject's medical history from their previous natalizumab study. A clinically significant infectious illness within 30 days prior to study entry visit in study C-1808. C-1802 subjects who have discontinued both study drug and AVONEX. Any subjects who have discontinued study drug in study C-1801, C-1802, or C-1803 because of an AE or due to reasons other than significant disease progression. Female subjects who are not post menopausal for at least 1 year, surgically sterile or willing to practice effective contraception during the study. Women who are breast feeding, pregnant or planning to become pregnant while on the study.

Design outcomes

Primary

MeasureTime frame
Main Objective: To determine the safety and the immunogenicity of extended treatment with natalizumab when administered at a dose of 300 mg intravenously (IV) to subjects with multiple sclerosis (MS) who have completed studies C-1801, C-1802, or C-1803.;Secondary Objective: To determine the durability of the efficacy response of extended treatment with natalizumab when administered at a dose of 300 mg intravenously (IV) to subjects with multiple sclerosis (MS) who have completed studies C-1801, C-1802, or C-1803.;Primary end point(s): The primary objective of the study is to determine the safety and immunogenicity of extended treatment with natalizumab when administered at a dose of 300 mg IV to subjects with multiple sclerosis who have completed natalizumab studies C-1801, C-1802, or C-1803. The safety endpoints under consideration will be the incidence of adverse events, changes in laboratory evaluations, vital signs, and physical examinations. The incidence of development of antibodies to natalizumab will also be assessed.

Countries

Sweden

Outcome results

None listed

Source: EU CTR (via WHO ICTRP) · Data processed: Feb 4, 2026