Table 2: Stimulant characteristics.

GenericHalf lifeExcretionPregnancy and lactationInteractions with food, herbs, smoking

Caffeine5 hrHepaticPregnancy class C
Enters breast bilk
Dexmethylphenidate2–4.5 hrHepaticPregnancy class C
breast milk: unknown
High-fat foods may increase absorption rate
Dextroamphetamine10–13 hrRenalPregnancy class C
Enters breast milk
Absorption may be altered by acidic foods, juices, and vitamin C
Dextroamphetamine and amphetamine10–13 hrRenalPregnancy class C
Enters breast milk
Absorption may be altered by acidic foods, juices, and vitamin C
Lisdexamfetamine10–13 hr*HepaticPregnancy class C
Enters breast milk
High-fat foods may increase absorption rate
Methylphenidate3-4 hrRenalPregnancy class C
Enters breast milk
Food delays absorption; high-fat meals increase Metadate AUC
Modafinil15 hrHepaticPregnancy class C
breast milk: unknown