Study of Cysteine Hydrochloride for Erythropoietic Protoporphyria

March 24, 2015 updated by: FDA Office of Orphan Products Development

OBJECTIVES:

I. Determine the efficacy of cysteine hydrochloride in preventing or decreasing photosensitivity in patients with erythropoietic protoporphyria.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

PROTOCOL OUTLINE: This is a randomized, double blind, placebo controlled, crossover study.

Patients are randomly assigned to 1 of 2 groups to receive cysteine hydrochloride orally twice daily, 2 capsules with breakfast and 2 with lunch. Group 1 receives cysteine hydrochloride in drug ingestion period 1 followed by placebo in period 2. Group 2 receives placebo in period 1 followed by cysteine hydrochloride in period 2. Both groups ingest placebo for 1 week between the periods. Each drug ingestion period lasts 8 weeks.

Follow up phone calls are made at the end of months 1 and 3. All patients schedule follow up visits at the end of each drug ingestion period.

Study Type

Interventional

Enrollment

20

Phase

  • Not Applicable

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 65 years (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

PROTOCOL ENTRY CRITERIA:

--Disease Characteristics-- Documented erythropoietic protoporphyria Determination of elevated protoporphyrin within the past year Experiencing photosensitivity --Prior/Concurrent Therapy-- No concurrent use of betacarotene --Patient Characteristics-- Other: Not pregnant or nursing Fertile female patients must use effective contraception while on study and for 3 weeks thereafter

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: TREATMENT
  • Allocation: RANDOMIZED
  • Interventional Model: CROSSOVER
  • Masking: DOUBLE

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

FDA Office of Orphan Products Development

Collaborators

St. Luke's-Roosevelt Hospital Center

Investigators

  • Study Chair: Micheline M Mathews-Roth, St. Luke's-Roosevelt Hospital Center

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

October 1, 1996

Study Completion

July 1, 1998

Study Registration Dates

First Submitted

February 24, 2000

First Submitted That Met QC Criteria

February 24, 2000

First Posted (ESTIMATE)

February 25, 2000

Study Record Updates

Last Update Posted (ESTIMATE)

March 25, 2015

Last Update Submitted That Met QC Criteria

March 24, 2015

Last Verified

August 1, 1998

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 199/13413
  • BWH-FDR000996-EF
  • SLRH-CU-FDR000996-EF

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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