Skip to content

Effects of NMDA-receptor antagonism on hyperalgesia, opioid use, and pain after major surgery in young and elderly patients

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN64506738
Enrollment
132
Registered
2005-09-26
Start date
2002-04-01
Completion date
Unknown
Last updated
2015-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Postoperative pain in radical prostatectomy Surgery Postoperative pain

Interventions

Amantadine versus Placebo comparison. Trial details received: 12 September 2005

Sponsors

University Health Network, Toronto (Canada)
Lead Sponsor

Eligibility

Sex/Gender
Male

Inclusion criteria

Inclusion criteria: 1. Able to read and write English 2. Age 18 - 54 years or greater than 55 years, male 3. American Society of Anesthesiologists (ASA) class 1 to 3 4. Scheduled for elective radical prostatectomy 5. Body weight between 60 and 90 kg, Body Mass Index (BMI) less than or equal to 30

Exclusion criteria

Exclusion criteria: 1. Significant Central Nervous System (CNS), respiratory, cardiac, hepatic, renal or endocrine dysfunction and/or any significant sequelae 2. Contraindications allergies to, and/or past adverse reactions to opioid analgesics or amantadine 3. History of Diagnostic and Statistical Manual of Mental Disorders, 4th edition (DSM-IV) axis I disorder or cognitive dysfunction 4. History of epilepsy or other seizures 5. History of chronic pain of at least 6 months duration 6. History of long-term opioid use for chronic pain 7. History of long-term use of amantadine or other antiparkinsonian drug 8. Ingestion of antiussive medication within 48 hours before surgery 9. History of alcohol or drug dependency/abuse of at least 6 months duration

Design outcomes

Primary

MeasureTime frame
Hyperalgesia and opioid consumption.

Secondary

MeasureTime frame
Assess age differences in the intensity and course of secondary hyperalgesia after surgery.

Countries

Canada

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026