Hyperalgesia in Methadone-Maintained Patients: Can it be Treated?

Completed · Phase 2 · Has a placebo group

Conditions studied: Opioid-Induced Hyperalgesia

In brief

Utilizing a double-blind, placebo-controlled design, the proposed work will evaluate the ability of an adjuvant anticonvulsant analgesic to diminish or reverse the opioid-induced hyperalgesia complicating the pain states suffered by Methadone-Maintained (MM) patients. Specifically, in a sample of MM patients, gabapentin, which has proven efficacy in treating neuropathic pain will be evaluated for its ability to ameliorate or diminish the opioid-induced hyperalgesia in these patients as reflected by changes on pain threshold and tolerance to both cold-pressor and electrical pain, at peak and through methadone blood levels. The results of this work will not only provide pharmacologic insight into the mechanisms underlying poor pain tolerance in this at-risk population, but also direction for the medical management of pain complicated by opioid-induced hyperalgesia.

Key facts

Study ID

NCT01210079

Run by

University of California, Los Angeles

People needed

26

Starts

2002-09-01

Expected to finish

2010-05-01

Last updated by the study team

2012-04-06

Who can join

Age: 21 and older, up to 55. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Potential participants must:
• Be between the ages of 21 and 55 years of age.
• DSM-IVR diagnosis of prescription opioid abuse or dependence disorder
• Be compliant in methadone treatment
• On a stable dose of methadone at least 6 weeks.
• Have provided random urine samples absent of any non-prescribed drugs of abuse x 2 months
• Be in good physical health or in the case of a medical condition needing ongoing treatment, be in the care of a physician who is willing to take responsibility for such treatment. The same conditions apply in cases of patients with a psychiatric disorder needing ongoing treatment.
• Be agreeable to and capable of signing an informed consent.

You may not qualify if…

• Potential participants must not:
• Have known sensitivity to gabapentin.
• Be substance dependent on alcohol, benzodiazepine, methamphetamine, cocaine or other drugs of abuse (except nicotine).
• Have any acute medical condition that would make participation medically hazardous, (e.g., acute hepatitis, unstable cardiovascular disease, liver or renal disease) or have liver enzyme values (AST or ALT) greater than 5 times normal range.
• Be acutely psychotic, severely depressed and in need of inpatient treatment, or an immediate suicide risk.
• Have a neurological or psychiatric illness (i.e., schizophrenia, Raynaud's disease, urticaria, stroke) that would affect pain responses.
• Be currently taking opioid analgesic medication for a painful condition on a regular basis.
• Be a nursing or pregnant female. Female of childbearing potential must agree to use a medically acceptable method of birth control, (e.g. oral contraceptives, barrier (diaphragm or condom) with or without spermicide, levonorgestrel implant, intra-uterine progesterone contraceptives system, medroxyprogesterone acetate contraceptive injection) or to complete abstinence. Females who become pregnant during the course of the study will be dropped from the study.
• Have a current or past history of high blood pressure, heart disease, stroke or currently have a pacemaker.

Where it is running

• UCLA School of Nursing — Los Angeles, California, United States

Full record on ClinicalTrials.gov

Trial information comes from ClinicalTrials.gov and is refreshed daily. TrialsForMe does not provide medical care and does not run the studies it lists.