# A Safety and Effectiveness Study of Methylphenidate HCl Extended-release Tablets in Adults With Attention Deficit Hyperactivity Disorder

> **NCT00326391** · PHASE3 · COMPLETED · sponsor: **McNeil Consumer & Specialty Pharmaceuticals, a Division of McNeil-PPC, Inc.** · enrollment: 229 (actual)

## Conditions studied

- Attention Deficit Disorder With Hyperactivity

## Interventions

- **DRUG:** methylphenidate hydrochloride extended-release tablets

## Key facts

- **NCT ID:** NCT00326391
- **Lead sponsor:** McNeil Consumer & Specialty Pharmaceuticals, a Division of McNeil-PPC, Inc.
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2006-04
- **Primary completion:** 2006-12
- **Final completion:** 2006-12
- **Target enrollment:** 229 (ACTUAL)
- **Last updated:** 2011-05-24


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00326391

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00326391, "A Safety and Effectiveness Study of Methylphenidate HCl Extended-release Tablets in Adults With Attention Deficit Hyperactivity Disorder". Retrieved via AI Analytics 2026-06-09 from https://api.ai-analytics.org/clinical/NCT00326391. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*