3,4-Diaminopyridine for Lambert-Eaton Myasthenic Syndrome (LEMS) and Congenital Myasthenia (CM)

Congenital Myasthenia (CM) Clinical Trial

Official title:

3,4-Diaminopyridine for Lambert-Eaton Myasthenic Syndrome and Congenital Myasthenia

Clinical Trial Details — Status: No longer available

Administrative data

• NCT number: NCT02012933
• Other study ID #: Jacobus compassionate program
• Status: No longer available

Study information

• Verified date: December 2019
• Source: Oregon Health and Science University
• Contact: n/a
• Is FDA regulated: No
• Study type: Expanded Access

Clinical Trial Summary

Lambert-Eaton Myasthenic Syndrome (LEMS) is a rare autoimmune disorder which affects the nerve-muscle junction. The major symptoms of LEMS are progressive muscle weakness. Many patients experience other symptoms like dry mouth or impotence. Congenital Myasthenia (CM) is an inherited disorder with similar affects and symptoms.

3,4-Diaminopyridine (DAP) is an experimental drug that has improved strength in some subjects with (LEMS). There are no other accepted treatments for LEMS and DAP has relatively few side effects.

Description:

Subjects with clinically confirmed LEMS or CM will receive 3,4-diaminopyridine (3,4 DAP) by mouth in slowly increasing doses. Treatment will begin with 5-10 mg three times a day. A common final dosage is 15-20 mg four or five times a day, as clinically needed, and if tolerated. The upper limit is a total of 100 mg/day. Subjects will be monitored for strength and side effects via routine clinic visits at intervals of one month for the first three months, then every three months for the first year, and at least every six months thereafter. Treatment will be continued indefinitely if a good clinical response is achieved and side effects are tolerable.

Recruitment information / eligibility

• Status: No longer available
• Enrollment: 0
• Gender: All
• Age group: 2 Years and older

Eligibility

Inclusion Criteria:

• Diagnosis of LEMS or CM

• If female and over the age of 9, must have a negative pregnancy test, and, if premenopausal, must be willing to practice an effective form of birth control.

• Must be tested and found by ECG not to have a prolonged Q-Tc syndrome.

• Must agree to have a second ECG at the time of peak drug effect.

Exclusion Criteria:

• Known to have sensitivity to 3,4-DAP

• History of clinical seizures or evidence of seizure activity on screening EEG

• History of severe asthma

Related Conditions & MeSH terms

• Congenital Myasthenia (CM)
• Lambert-Eaton Myasthenic Syndrome
• Lambert-Eaton Myasthenic Syndrome (LEMS)
• Muscle Weakness
• Myasthenic Syndromes, Congenital
• Syndrome

Intervention

Drug:
• 3,4-diaminopyridine
10mg tablets for up to 100mg per day

Locations

Country	Name	City	State
United States	Oregon Health & Science University	Portland	Oregon

Sponsors (2)

Lead Sponsor	Collaborator
Oregon Health and Science University	Jacobus Pharmaceutical

Country where clinical trial is conducted

United States,