Modafinil 400mg is a prescription drug used to induce wakefulness in adults suffering from some sleep disorders. These might include narcolepsy, obstructive sleep apnoea accompanied by excessive daytime sleepiness, as well as shift work sleep disorder. The drug has an effect on the processes of signalling within the central nervous system responsible for maintaining wakefulness, but it is not completely clear how it works.

The dose of 400 mg is quite high and may not be appropriate for everyone. In each case, it should depend on the patient’s specific health condition, the effectiveness of the therapy, medical history, and other medications. Patients should not decrease or increase their doses without consulting a physician.

Some of the common side effects might be headache, nausea, dizziness, anxiety, nervousness, dry mouth, and insomnia. Allergic and dermatological reactions are rare but need to be treated immediately by a medical professional. Also, the drug interacts with other drugs and decreases the effectiveness of contraceptive drugs based on hormones.

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