The modafinil 400 mg drug is a higher dosage of the medication modafinil which is a prescription medicine that is used to increase alertness and treats excess sleepiness caused by some sleeping disorders. It is used by adults suffering from narcolepsy, obstructive sleep apnea, and shift work disorder. The regular prescribed dose of the medication is 200 mg per day, while 400 mg might be recommended by the doctor in certain cases. According to the available prescribing data, 400 mg dose has been found to be well-tolerated; however, higher doses have not been shown to provide additional benefits as compared to the dose of 200 mg. Some side effects that might appear after taking the drug include headache, nausea, nervousness, anxiety, and insomnia. There might be some interactions between modafinil and other medicines, including birth control pills, which might decrease their effectiveness. Severe side effects that require immediate treatment are skin rashes, allergies, and psychiatric reactions. Thus, the medication should be taken according to the prescription only, and not used to treat regular fatigue.
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