# Drug Discrimination in Methadone-Maintained Humans Study 1

> **NCT00593463** · PHASE1 · COMPLETED · sponsor: **University of Arkansas** · enrollment: 40 (estimated)

## Conditions studied

- Drug Dependence

## Interventions

- **DRUG:** Cycloserine
- **DRUG:** Diltiazem
- **DRUG:** Gabapentin
- **DRUG:** Isradipine
- **DRUG:** Naloxone
- **DRUG:** Nifedipine
- **DRUG:** Placebo
- **DEVICE:** Saline
- **DRUG:** Verapamil

## Key facts

- **NCT ID:** NCT00593463
- **Lead sponsor:** University of Arkansas
- **Sponsor class:** OTHER
- **Phase:** PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2006-09
- **Primary completion:** 2010-05
- **Final completion:** 2010-05
- **Target enrollment:** 40 (ESTIMATED)
- **Last updated:** 2011-03-11


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00593463

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00593463, "Drug Discrimination in Methadone-Maintained Humans Study 1". Retrieved via AI Analytics 2026-07-26 from https://api.ai-analytics.org/clinical/NCT00593463. Licensed CC0.

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