Modafinil 100mg is a versatile strength of the wakefulness-promoting medication Provigil, often serving as an entry-level dose for those new to the treatment. While the standard 200mg dose is more common for severe cases, the 100mg tablet is frequently prescribed for patients who require a gentler cognitive lift or for those who may be more sensitive to stimulants. It is a vital option for specific groups, such as elderly patients over 65 or individuals with severe liver impairment, as a lower dose prevents the medication from accumulating to toxic levels in the body. Despite the lower concentration, it retains a long half-life of 12 to 15 hours, providing a sustained "wakeful calm" that helps manage excessive sleepiness without the intense physical jitters associated with higher doses or traditional stimulants.