- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01236859
Gabapentin for Prophylaxis Intrathecal Morphine-Induced Pruritus
Gabapentin for Prophylaxis Intrathecal Morphine-Induced Pruritus After Orthopedics Surgery
Intrathecal morphine provides good postoperative analgesia for up to 18-24 hour after administration. Pruritus is the most common side effect of intrathecal morphine, which the incidence was reported as 20%-100%2 and 63% in Songklanagarind Hospital. Pathophysiology of opioid-induced pruritus remain unclear and more than one mechanism may be involved in the development of opioid-induced pruritus, such as, mediated central µ opioid receptors, Dopamine (D2) receptors, Serotonin (5-HT3) receptors, prostaglandin system, GABA receptors, and glycine receptors, so that why opioid-induced pruritus is difficult to manage. Many medications have been used to treat this side effect included antihistamines, 5-HT3 (serotonin) receptor antagonists, opioid antagonists, opioid agonist-antagonists, propofol, and nonsteroidal antiinflammatory drugs.
Gabapentin is an anticonvulsant, a structural analog of aminobutyric acid, and currently approved by the Food and Drug Administration for the treatment of partial seizures and postherpetic neuralgia. Many studies have shown gabapentin to be effective in the case of brachioradial pruritus, itch of neuropathic in origin, uremic pruritus, multiple sclerosis-induced pruritus,cholestatic pruritus, itch produced by burn, and pruritus of unknown origin. However, there is only one small study in Taiwan shown the effectiveness of gabapentin 1200 mg in prevention of intrathecal morphine-induced pruritus in orthopedic surgery, which could reduce incidence of pruritus from 77.5% to 47.5% (38.7% reduction). Because gabapentin has several side effects especially in high dose such as drowsiness, dry mouth, headache, unsteadiness, reduced co-ordination or slowed reaction, constipation, diarrhea, peripheral edema, dizziness, confusion, loss of concentration, weight gain, and nausea, vomiting, so in our study we decided to reduce the dose of gabapentin. Therefore, we would like to know if gabapentin in a smaller dose (600 mg) used in the wider range of age including the elderly can decrease the incidence of intrathecal morphine-induced pruritus in orthopedic surgery in Songklanagarind Hospital.
Study Overview
Detailed Description
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
Songkhla
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Hat Yai, Songkhla, Thailand, 90110
- Songklanagarind hospital
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-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- aged between 15-70 yr, ASA physical status I-III, and were scheduled for lower limb surgery under spinal anesthesia.
Exclusion Criteria:
- contraindication for spinal anesthesia, known allergy history to gabapentin, complaint of pruritus before surgery, morbid obesity (BMI > 35), coexisting skin disorder, and any systemic disease associated with pruritus. Patients who had history of seizure attacks, mental illness, chronic headache, or neuropathic pain and were concomitantly using of anticonvulsants, antidepressants, antipsychotics, or antihistamine
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Quadruple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Placebo Comparator: placebo
The patients in the placebo group received equal numbers of identical looking placebo 2 h before operation
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Neurontin®, Pfizer
Other Names:
|
Active Comparator: gabapentin
Patients in the gabapentin group received two capsules of gabapentin 300 mg (Neurontin®, Pfizer) at 2 h before operation.
|
Neurontin®, Pfizer
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
incidence of pruritus postoperatively
Time Frame: 0-24 h
|
the incidence of pruritus during the 24 h follow-up period
|
0-24 h
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
onset time and severity of pruritus
Time Frame: 0-24 h
|
The difference of onset time and severity of pruritus in the gabapentin and placebo groups
|
0-24 h
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Wirinda Chiravanich, MD, Prince of Songkhla University
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Skin Diseases
- Skin Manifestations
- Pruritus
- Physiological Effects of Drugs
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Central Nervous System Depressants
- Peripheral Nervous System Agents
- Analgesics
- Sensory System Agents
- Excitatory Amino Acid Antagonists
- Excitatory Amino Acid Agents
- Tranquilizing Agents
- Psychotropic Drugs
- Anti-Anxiety Agents
- Anticonvulsants
- Antimanic Agents
- Gabapentin
Other Study ID Numbers
- GP180
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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