Waklert 150mg keeps people awake for 8–12 hours, depending on metabolism, tolerance, and sensitivity. Its effects begin 1–2 hours after ingestion and peak 6–8 hours later. It is used to treat shift work sleep disorder, obstructive sleep apnea, and narcolepsy-related drowsiness. Waklert effects last differently. Some people stay up longer, while others fall asleep faster. To avoid sleep problems, take Waklert as advised, preferably in the morning or before work.