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•Suvorexant may cause daytime somnolence (excess sleepiness). • Risk of impaired alertness, motor coordination, impaired driving may be seen which increases with increase in the dose.‍​‍‍‍​‍‍‍‍‍‍‍‍​‍ So, patients are advised to take a low dose in case of next-day driving and other activities requiring full mental alertness. • Nighttime sleep-driving and other abnormal behaviors, sleep paralysis, hallucinations may be seen with excess dose and with use of CNS depressants, alcohol along with suvorexant. Family members should monitor these effects and should inform the health care provider during their next visit. • Worsening of depression or suicidal thoughts may occur. Evaluate the patient for any new behavioral changes and take to a nearby hospital immediately. • Patients are reevaluated if insomnia persists after 7 to 10 days of treatment.