Although Armodavinil has the low potential for causing tolerance, one may experience it if the drug is used incorrectly. The best way to prevent tolerance is to use the drug exactly as prescribed by a doctor or healthcare provider. For starters, unless your purpose of using it is to treat narcolepsy, shift work sleep disorder (SWSD), or obstructive sleep apnea (OSA), it should only be taken 3 times a week or less. However, the drug can be used safely for up to 12 weeks. Seek advice from your doctor.