Modafinil reduces extreme sleepiness due to narcolepsy and other sleep disorders, such as periods of stopped breathing during sleep (obstructive sleep apnea). It is also used to help you stay awake during work hours if you have a work schedule that keeps you from having a normal sleep routine (shift work sleep disorder).
This medication does not cure these sleep disorders and may not get rid of all your sleepiness. Modafinil does not take the place of getting enough sleep. It should not be used to treat tiredness or hold off sleep in people who do not have a sleep disorder.
It is not known how modafinil works to keep you awake. It is thought to work by affecting certain substances in the brain that control the sleep/wake cycle.
For narcolepsy, take this medication by mouth with or without food as directed by your doctor, usually once daily in the morning. Or, if your doctor directs you to, the total daily dose of modafinil may be divided into a morning dose and a noon dose.
For obstructive sleep apnea, take this medication by mouth with or without food as directed by your doctor, usually once daily in the morning. Continue your other treatment (such as the CPAP machine, mouth device) unless your doctor tells you to stop.
If you are using modafinil for shift work sleep disorder, take it by mouth with or without food as directed by your doctor, usually once a day 1 hour before you start your work shift.
The dosage is based on your medical condition and response to treatment. Take this medication regularly to get the most benefit from it.
Along with its benefits, this medication may rarely cause abnormal drug-seeking behavior (addiction). This risk may be increased if you have abused alcohol or drugs in the past. Take this medication exactly as prescribed to lessen the risk of addiction.
Tell your doctor if your condition does not improve or if it worsens.
Remember that your doctor has prescribed this medication because he or she 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: fast/pounding/irregular heartbeat, mental/mood changes (such as agitation, confusion, depression, hallucinations, rare thoughts of suicide).
Get medical help right away if you have any very serious side effects, including: chest pain.
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: fever, swollen lymph nodes, 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.
Before taking modafinil, tell your doctor or pharmacist if you are allergic to it; or to armodafinil; 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: heart problems (such as enlarged heart, mitral valve problem, chest pain, heart attack, irregular heartbeat), heart problems after taking stimulant drugs such as amphetamines (including chest pain, irregular heartbeat), high blood pressure, liver problems, mental/mood disorders (such as depression, mania, psychosis), personal or family history of regular use/abuse of drugs/alcohol.
Sleep disorders may reduce your ability to react quickly. Though modafinil helps keep you awake, you still may not be able to safely do things that require quick reactions (such as driving). This drug may also make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Avoid alcoholic beverages.
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Some products that may interact with this drug include: street drugs (such as methamphetamine, MDMA/"ecstasy").
This medication may decrease the effectiveness of hormonal birth control such as pills, patch, or ring. This could cause pregnancy. Discuss with your doctor or pharmacist if you should use additional reliable birth control methods while using this medication and for 1 month after stopping this medication. Also tell your doctor if you have any new spotting or breakthrough bleeding, because these may be signs that your birth control is not working well.
Modafinil can speed up the removal of other medications from your body, which may affect how they work. Examples of affected drugs include axitinib, bosutinib, certain products used to treat chronic hepatitis C (asunaprevir, ombitasvir/paritaprevir/ritonavir), among others.
Check the labels on all your medicines (such as cough-and-cold products, diet aids) because they may contain ingredients that could increase your heart rate or blood pressure. Ask your pharmacist about using these products safely.
Caffeine can increase the side effects of this medication. Avoid drinking large amounts of beverages containing caffeine (coffee, tea, colas), eating large amounts of chocolate, or taking nonprescription products that contain caffeine.
Modafinil is very similar to armodafinil. Do not take medications containing armodafinil while using modafinil.
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose include: fast/irregular heartbeat, severe restlessness, hallucinations.
If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip themissed dose and resume your usual dosing schedule. Do not double the dose to catch up. Do not take missed doses close to bedtime because doing so may make it harder to go to sleep.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.Information last revised August 2016. Copyright(c) 2016 First Databank, Inc.
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