Modafinil 100 mg is a prescription medication used to promote wakefulness in individuals with sleep disorders such as narcolepsy, sleep apnea, and shift work sleep disorder. It helps enhance alertness, focus, and cognitive performance by influencing certain neurotransmitters in the brain. Modafinil is widely recognized for its ability to reduce excessive daytime sleepiness and improve productivity without the jittery side effects commonly associated with stimulants.