Clinical trial NCT01623271: Treatment of Complex Regional Pain Syndrome With Once Daily Gastric-Retentive Gabapentin (Gralise)
Official title: Treatment of Complex Regional Pain Syndrome With Once Daily Gastric-Retentive Gabapentin (Gralise)
Study type: INTERVENTIONAL
Overall status: TERMINATED
Phase: NA
Conditions: Complex Regional Pain Syndrome I (CRPS I)
Keywords: CRPS I
Lead sponsor: Massachusetts General Hospital
Sponsor class: OTHER
First posted: 2012-06-19
Enrollment: 5
Sex: ALL
Minimum age (years): 18
Maximum age (years): 80
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: The purpose of this study is to see if an FDA-approved drug (Gralise) can help people with certain types of neuropathic pain without causing too many side effects.

Detailed description: This research is being conducted to see if the drug Gralise can help people with Complex Regional Pain Syndrom Type I (CRPS I) without causing too many side effects. CRPS I is one of the most common conditions of neuropathic pain (pain that results from damage to nerves in the peripheral nervous system). Gralise is approved by the U.S. Food and Drug Administration (FDA) to treat postherpetic neuralgia (a complication of the disease Shingles, which is caused by the chickenpox virus), but is not approved to treat CRPS I.

Eligibility criteria: Inclusion Criteria:

1. Subject will be between 18 to 80 years of age.
2. Subject has not been on Gralise.
3. Subject has not been on gabapentin for at least one month.
4. Subject agrees to make no change in his/her current pain medications during the study period to ensure that comparisons can be made before and after the Gralise treatment.
5. Subject has a VAS pain score of 5 or above at the beginning of the study.
6. Subject has had CRPS I for at least three months to avoid clinical uncertainty and minimize the study variation.
7. Female subjects of childbearing age must have a negative urine pregnancy test at the initial visit.

Exclusion Criteria:

1. Subject has severe liver or renal disease that will affect the elimination of Gralise. (Renal dysfunction is defined as eGFR \< 60. Hepatic dysfunction is defined as LFTs ≥ 3X ULN.)
2. Subject has pending litigation related to his/her CRPS I condition.
3. Subject is pregnant or lactating.
4. Subject is allergic to gabapentin or Gralise.
5. Subject has a positive urine (illicit) drug test.
6. Subject has any history of suicidal thoughts or behaviors, as self reported or in documented medical history.
7. Subjects with known seizure disorders (except febrile seizures) and/or taking antiepileptic drugs.

Primary outcomes:
measure: Visual Analog Scale (VAS) at Visit 3
timeFrame: At visit 3
Secondary outcomes:
Other outcomes:
Locations:
city: Boston
country: United States
facility: Massachusetts General Hospital
state: Massachusetts
Study officials:
affiliation: Massachusetts General Hospital
name: Jianren Mao, M.D., Ph.D.
role: PRINCIPAL_INVESTIGATOR
References:
citation: Mao J. Translational pain research: achievements and challenges. J Pain. 2009 Oct;10(10):1001-11. doi: 10.1016/j.jpain.2009.06.002. Epub 2009 Jul 22.
citation: Mao J, Chen LL. Systemic lidocaine for neuropathic pain relief. Pain. 2000 Jul;87(1):7-17. doi: 10.1016/S0304-3959(00)00229-3.
citation: Mao J, Gold MS, Backonja MM. Combination drug therapy for chronic pain: a call for more clinical studies. J Pain. 2011 Feb;12(2):157-66. doi: 10.1016/j.jpain.2010.07.006. Epub 2010 Sep 17.
citation: Sindrup SH, Jensen TS. Efficacy of pharmacological treatments of neuropathic pain: an update and effect related to mechanism of drug action. Pain. 1999 Dec;83(3):389-400. doi: 10.1016/S0304-3959(99)00154-2.
citation: van de Vusse AC, Stomp-van den Berg SG, Kessels AH, Weber WE. Randomised controlled trial of gabapentin in Complex Regional Pain Syndrome type 1 [ISRCTN84121379]. BMC Neurol. 2004 Sep 29;4:13. doi: 10.1186/1471-2377-4-13.