Table 1.

Treatment of daytime sleepiness in narcolepsy

Drug	Usual total daily dose (mg)	Usual frequency (times/day)*
Dexamfetamine	10-60	2-4
Methylphenidate	20-60	2
Modafinil	200-400	1-2

^*Routine use of drugs late in the day is inadvisable as it may disturb nocturnal sleep. Adjustment of doses and timings to fit in with individual needs is often helpful.