Waklert 150 mg may be prescribed for excessive daytime sleepiness associated with certain sleep disorders. These may include narcolepsy, obstructive sleep apnea, and shift work sleep disorder. The medicine is intended to promote wakefulness and support daytime functioning. Possible side effects can include headache, nausea, dizziness, or difficulty sleeping. Following the prescribed dose and discussing other medicines with a healthcare professional can improve safe use.