Extended-release ADHD medications explained: beads, pumps, prodrugs and patches

Most adults who take an ADHD stimulant take an extended-release form. Two products with the same active ingredient can behave quite differently because of how they release it. This article explains the main designs in plain words, using the descriptions in FDA labels. Brand names are used only to identify a design, not to recommend a product. Which form fits you is a decision for you and your prescriber.

Why extended release exists

Extended-release designs aim to cover more of the day with a single dose. NICE guideline NG87 suggests prescribers think about once-daily modified-release stimulants for several reasons: convenience, better adherence, less stigma because no dose is needed at work, and a lower risk of misuse and diversion than with immediate-release forms. It adds that immediate-release forms may suit people who need more flexible timing, and that a modified-release methylphenidate in the morning can be combined with an immediate-release dose later in the day to extend coverage.

The main designs at a glance

Osmotic tablets: the pump design

Concerta's FDA label from October 2023 described the tablet as an osmotic system. Under a semipermeable membrane sits a three-layer core: two drug layers and a "push" layer. An immediate-release drug overcoat dissolves within about an hour and provides the first part of the dose. Water then seeps through the membrane, the push layer swells, and drug is forced out through a laser-drilled hole at a controlled rate. The current label, revised in April 2026, no longer includes that description, but it still reports a first peak at about 1 hour followed by gradually rising levels over the next 5 to 9 hours.

Three practical points follow from the design, and all appear on the current label:

• Swallow it whole with liquid. Splitting, crushing or chewing compromises the extended release.
• The empty tablet shell can pass in the stool. The label tells patients not to be concerned if they occasionally notice a tablet-like object there.
• Because the tablet does not change shape, it should be used only by people who can swallow it whole and ordinarily not by people with severe narrowing of the gut.

Generic versions of this tablet have their own history with the FDA, covered in generic ADHD medications and authorized generics. Product detail is in Concerta for adults.

Bead capsules: a fast part and a slow part

Many capsules contain tiny beads with different coatings.

• Adderall XR contains two types of drug-containing beads, immediate-release and delayed-release, which prolong release compared with the immediate-release tablet. The label allows the capsule to be swallowed whole or opened and the entire contents sprinkled on applesauce, eaten right away without chewing. See Adderall XR for adults.
• Mydayis contains the same four amphetamine salts in three bead types: one immediate-release and two delayed-release bead types, one releasing at pH 5.5 and the other at pH 7.0 (two different levels of acidity). It is labeled for patients 13 and older.
• Focalin XR (dexmethylphenidate) and Ritalin LA (methylphenidate) each put half the dose in immediate-release beads and half in enteric-coated, delayed-release beads, which the labels call a bi-modal release profile. Ritalin LA is labeled only for children 6 to 12.

Prodrugs: release inside the body

A prodrug is inactive as swallowed and becomes active after the body changes it.

• Lisdexamfetamine (Vyvanse and generics) is converted to dextroamphetamine and the amino acid l-lysine mainly in the blood, by red blood cells. Capsules can be swallowed whole or opened and mixed into yogurt, water or orange juice, and chewable tablets are also available. The label says a single dose should not be divided. See Vyvanse for adults.
• Azstarys combines dexmethylphenidate, which acts right away, with serdexmethylphenidate, a prodrug that is likely converted to dexmethylphenidate mainly in the lower gut.

Evening-dosed capsules

Jornay PM takes the delay idea further. Its beads have an outer delayed-release coating that holds back the first release and an inner extended-release coating that controls release through the following day. The label says it should be taken only in the evening, never in the morning. It is labeled for patients 6 and older.

Patches

• Xelstrym is a dextroamphetamine patch labeled for adults and children 6 and older. The label says to apply it 2 hours before an effect is needed and remove it within 9 hours, rotating among the hip, upper arm, chest, upper back or flank. It also warns that it should not be swapped for other amphetamine products unit for unit, because their compositions and release profiles differ.
• Daytrana is a methylphenidate patch applied to the hip. Its label covers patients 6 to 17 only, so adult use is off-label.

More on non-tablet forms is in amphetamine liquids, ODT and patch and methylphenidate patch and other forms.

What release design does not change

• It is still a stimulant. Every product above carries the FDA's class-wide boxed warning on abuse, misuse and addiction. NICE advises against immediate-release stimulants, or modified-release ones that can easily be injected or snorted, when there is a risk of misuse.
• It is still Schedule II. Extended-release forms follow the same no-refill and supply rules as immediate-release forms. See New York's rules and New Jersey's rules.
• It is not interchangeable by default. Two extended-release products with the same ingredient can have different release profiles, so a switch is a prescribing decision. During shortages this matters; see ADHD medication shortages in New York.

Questions to ask your prescriber

• When during the day should this start working, and when will it wear off?
• Can I open the capsule or must I swallow it whole?
• What should I do if a late-day dip or trouble sleeping shows up?
• If my pharmacy is out of stock, which alternatives would you consider?

Dr. Shershow, a psychiatrist licensed in New York and New Jersey, provides medication management when medication is appropriate, including follow-up visits by secure video. See adult ADHD treatment.