Certain meals may worsen narcolepsy. Sugary meals and refined carbs like sweets, white bread, and pastries may spike and fall blood sugar, making you sleepy. Heavy, greasy meals may also cause fatigue and afternoon drowsiness. However, a diet rich in whole grains, lean meats, fruits, and vegetables helps alleviate narcolepsy symptoms. Hydrating and avoiding coffee and alcohol are also helpful. While Modalert 200 (modafinil) may help treat narcolepsy by encouraging alertness, a good diet is essential for symptom management. Always seek individualized medical advice.