Medication	Available forms	Dose (mg)	Doses per day	Effect duration (hours)
Rapid onset, short duration
Methylphenidate (Ritalin)*†	Tablet: 5, 10, 20 mg (10, 20 mg scored)	Initial: 5 Increment: 5 to 10	2 to 6	1 to 4
Dextroamphetamine (Dexedrine)*	Capsule: 5, 10, 15 mg	Initial: 2.5 to 5 Increment: 2.5 to 5	1 to 3	1 to 8
(Dextrostat)*	Tablet: 5 mg (scored)	Same as above	Same as above	Same as above
Slower onset, longer duration
Methylphenidate (Ritalin-SR)†	Tablet: 20 mg	Initial: 20 Increment: 20	1 to 3	3 to 9
(Metadate-ER)	Tablet: 10, 20 mg	Same as above	Same as above	Same as above
Dextroamphetamine (Dexedrine Spansules)*	Capsule: 5, 10, 15 mg	Initial: 5 Increment: 5	1 to 3	6 to 8
Pemoline (Cylert)	Tablet: 18.75, 37.5 and 75 mg, and 37.5-mg chewable tablet (all scored)	Initial: 37.5 Increment: 18.7	1 to 2	7 to 9
Rapid onset, longer duration
Amphetamine-dextroamphetamine (Adderall)*	Tablet: 5, 7.5, 10, 12.5, 15, 20, 30 mg (scored for halves and quarters)	Initial: 2.5 to 10 Increment: 2.5 to 5	1 to 3	6 to 8
Methylphenidate (Concerta)	Capsule: 18, 36, 54 mg	Initial†: 18 Increment: 18	1	12