Most people usually just need 200 mg of modafinil, such as Modvigil 200. For ailments like shift work sleep disturbance, sleep apnea, and narcolepsy, it is the usual recommended dosage. Several hours of wakefulness are encouraged by this dosage. Effectiveness varies from person to person, though. Always get your doctor's approval before changing or prolonging a dosage. https://www.smartfinil.net/product/modvigil-200/