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Lemborexant

Precautions

Before taking lemborexant, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: a certain sleep disorder (narcolepsy), liver disease, lung disease/breathing problems (such as sleep apnea, chronic obstructive pulmonary disease- COPD), mental/mood problems (such as depression, thoughts of suicide), personal or family history of a substance use disorder (such as overuse of or addiction to drugs/alcohol), a certain muscle weakness disorder (cataplexy).

The effects of this drug can last even after you wake up the next day. The risk of daytime drowsiness is greater if you did not get at least 7 hours of sleep or took a higher dose than recommended. If that is the case, you should not drive or do anything that needs alertness the next day. Alcohol or marijuana (cannabis) can also make you more sleepy. Avoid alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis). Do not drive, use machinery, or do anything that needs alertness until you can do it safely.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

Older adults may be more sensitive to the side effects of this drug, especially excessive drowsiness. Drowsiness may increase the risk of falls.

During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.

This medication passes into breast milk. Consult your doctor before breastfeeding.

Side Effects

Nightmares, unusual dreams, or tiredness may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.

Lemborexant may make you sleepy during the day. Tell your doctor if you have daytime drowsiness. Your dose may need to be adjusted.

Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor right away if you have any serious side effects, including: mental/mood changes (such as depression, hallucinations, thoughts of suicide), temporary weakness in your legs.

This medication may cause sleep paralysis, which is a temporary inability to move or talk (for up to several minutes) while you are going to sleep or waking up.

Rarely, after taking this drug, people have gotten out of bed and driven vehicles while not fully awake ("sleep-driving"). People have also sleepwalked, prepared/eaten food, made phone calls, or had sex while not fully awake. Often, these people do not remember these events. This problem can be dangerous to you or to others. If you find out that you have done any of these activities after taking this medication, tell your doctor right away.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

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RxAnswers™ is a copyrighted combined product from TraceGains and First DataBank, Inc.

Drug information is selected from data included with permission and copyrighted by First DataBank, Inc. This is a summary and does not contain all possible information about this product. For complete information about this product or your specific health needs, ask your healthcare professional. Always seek the advice of your healthcare professional if you have any questions about this product or your medical condition. This information is not intended as individual medical advice and does not substitute for the knowledge and judgment of your healthcare professional. This information does not contain any assurances that this product is safe, effective or appropriate for you.

This information is intended only for residents of the United States. Products sold under the same brand names in other countries may contain different ingredients.

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Information expires December 2025.