| Disease | narcolepsy | 
| Symptom | C2219848|daytime somnolence | 
| Sentences | 1 | 
| PubMedID- 21146447 | Although its precise mechanism of action remains to be established, modafinil is used as a wake-promoting agent for the treatment of narcolepsy, a disorder associated with excessive daytime somnolence. | 
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