A Study to Evaluate the Safety and Tolerability of Arbaclofen Placarbil (XP19986) in Subjects With Acute Back Spasms
Conditions
Interventions
- DRUG: Arbaclofen placarbil, 20 mg
- DRUG: Placebo
- DRUG: Arbaclofen placarbil, 30 mg
- DRUG: Arbaclofen placarbil, 40 mg
Sponsor
XenoPort, Inc.