Abstract:
BACKGROUND:Trigeminal neuralgia (TN) is a rare severe unilateral facial pain condition. Current guidelines in trigeminal neuralgia management recommend sodium channel blockers--carbamazepine or oxcarbazepine--as the first-line treatment. However, the currently available drugs are often associated with poor tolerability resulting in sub-optimal pain control. CNV1014802 is a novel sodium channel blocker that is being assessed in the treatment of trigeminal neuralgia. Due to the severity of the condition, it is not ethical to conduct a traditional placebo-controlled randomized controlled trial. It is also difficult to use an active control such as carbamazepine, the current gold standard, because of its complex pharmacology and potential for drug interactions. METHODS/DESIGN:The trial uses a randomized withdrawal design to assess efficacy in this rare condition. There is a 21-day open-label phase followed by a randomized 28-day placebo-controlled phase for responders. Thirty patients will be randomized. The primary outcome measure will be pain relief, but secondary measures of quality of life will be of significant importance given the effect of this condition on activities of daily living. Safety and adverse event endpoints are described. DISCUSSION:There have been very few well-controlled, randomized, placebo-controlled studies in trigeminal neuralgia, and the majority of drugs have had other primary uses. Due to the severity of the pain, minimizing the time a patient is administered placebo was a key factor in designing this study. This study will not only provide data on the efficacy of CNV1014802 in trigeminal neuralgia, but will also provide information on the effectiveness and acceptability of a novel trial design in trigeminal neuralgia. TRIAL REGISTRATION:Trial number NCT01540630.
journal_name
Trialsjournal_title
Trialsauthors
Zakrzewska JM,Palmer J,Ettlin DA,Obermann M,Giblin GM,Morisset V,Tate S,Gunn Kdoi
10.1186/1745-6215-14-402subject
Has Abstractpub_date
2013-11-23 00:00:00pages
402issn
1745-6215pii
1745-6215-14-402journal_volume
14pub_type
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