There are two main types of caffeine that might be in Provigil, and they're: Dose of caffeine in Provigil. The regular dosage of caffeine in Provigil is 60 milligrams. This is a really mild stimulant, and it's also really not as powerful than a few of the other nootropic drugs in the marketplace. Symptoms. Some of the most typical outward indications of narcolepsy consist of: a failure to...