Yes, you can skip a day of modafinil if necessary, since it is not a drug that requires daily administration to be effective. Modalert 200 Australia (which contains Modafinil) is usually taken as needed, especially for conditions such as narcolepsy or excessive daytime sleepiness. However, skipping a dose can lead to increased fatigue or a return of symptoms that were management, such as drowsiness or lack of concentration. Always consult your health care professional for specific advice regarding your dosage regimen, especially if it is used to improve cognitive function or for other off-label uses.