Armodafinil usually lasts longer, allowing for prolonged alertness for the most of the day. Effects usually start an hour after consumption, peaking in alertness three to five hours later. Although some people see effects for up to eighteen hours, the average duration is twelve to fifteen hours. Many users of waklert 150mg experience smoother energy without abrupt crashes, less drowsiness, and consistent focus. Metabolism, dosage timing, meal consumption, and sensitivity all affect duration. Due to its lengthy half-life, late dose might disrupt sleep at night, hence when suitable, morning usage under medical supervision is often advised.