Imagabalin
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| Other names | PD-0332334; PD-332,334 | 
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| Formula | C9H19NO2 | 
| Molar mass | 173.256 g·mol−1 | 
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Imagabalin (INN, USAN; PD-0332334) was an investigational drug that acts as a ligand for the α2δ subunit of the voltage-dependent calcium channel, with some selectivity for the α2δ1 subunit over α2δ2. It was under development by Pfizer as a pharmaceutical medication due to its hypothesized anxiolytic, analgesic, hypnotic, and anticonvulsant-like activity. It reached phase-III clinical trials for treatment of generalized anxiety disorder; however, the trials were terminated by the manufacturer. The drug is no longer under development.