Medicine Name: Levipil XR 500 Tablet. Composition: Levetiracetam (500mg). Side Effects: Sleepiness Dizziness Fatigue Headache Decreased appetite Behavioral changes Aggressive behavior Irritation Agitation Nasal congestion stuffy nose Infection Convulsion Nasopharyngitis inflammation of the throat and nasal passages Nausea Tremors Vertigo Lethargy.