Compare ADHD medicines
Ritalin XL vs Concerta XL: why is 20 mg not the same as 18 mg?
Ritalin XL and Concerta XL contain methylphenidate, but release it differently. The dose number alone does not tell you how much benefit you will get or when. Ritalin XL 20 mg and Concerta XL 18 mg are not a direct swap.
Written and clinically reviewed by Adam OdusholaADHD Advanced Practitioner and Clinical Prescribing Pharmacist
Last updated: Last reviewed: Next review:Key points
- Both contain methylphenidate, but release it differently.
- Ritalin XL covers up to about 8 hours; Concerta XL up to about 12 hours.
- Ritalin XL 20 mg and Concerta XL 18 mg are not a direct swap.
How does the release pattern differ?
| Feature | Ritalin XL | Concerta XL |
|---|---|---|
| Form | Modified-release capsule | Prolonged-release tablet |
| Release | Half the dose (50%) straight away and the other half (50%) about 4 hours later | About a fifth (22%) straight away from the tablet’s coating, and the rest (78%) released gradually over the day |
| Approximate coverage | Up to about 8 hours | Up to about 12 hours |
| Food | With or without food | With or without food |
| Swallowing | May be opened according to its leaflet; do not chew the pellets | Swallow whole |
Sources: Ritalin XL: Summary of Product Characteristics; Concerta XL: Summary of Product Characteristics; Prescribing and switching between modified-release methylphenidate.
Why do the milligram numbers differ?
The total dose and the way it is released both matter.
The manufacturers give different conversion examples for people already taking immediate-release methylphenidate:
| Existing immediate-release schedule | Manufacturer’s corresponding product |
|---|---|
| 10 mg twice daily, 20 mg in total | Ritalin XL 20 mg once daily |
| 5 mg three times daily, 15 mg in total | Concerta XL 18 mg once daily |
Sources: Ritalin XL: Summary of Product Characteristics; Concerta XL: Summary of Product Characteristics.
These are examples from separate conversion tables. They are not starting-dose advice or instructions to switch between Ritalin XL and Concerta XL yourself.
Does a larger early release mean better treatment?
Not necessarily. What matters is whether the medicine helps at the times you need it and whether side effects are manageable.
One person may prefer a shorter period of coverage. Another may need help later in the day. A larger early release does not establish that a product is stronger, gentler or better.
What should I check before switching?
Ask your prescriber to confirm the exact brand, dose, start date and review plan. Check how to take the new medicine and whether any previous doses should stop.
Record changes in morning benefit, afternoon benefit, appetite, sleep and mood. Tell your prescriber if the new pattern is difficult to manage. See switching methylphenidate brands safely.
Source: Prescribing and switching between modified-release methylphenidate.
Common questions
Are Ritalin and Ritalin XL the same?
They contain the same active ingredient but release it differently. “XL” identifies the modified-release capsule. Check the full product name on your prescription and pack.
Can I split Concerta XL to make a different dose?
No. Swallow it whole. Splitting, chewing or crushing it interferes with how the tablet releases medicine.
If Ritalin XL wears off earlier, should I take another capsule?
Only if that is explicitly part of your prescription. Tell your prescriber about the gap rather than adding a dose yourself.
Sources
- Ritalin XL: Summary of Product Characteristics. eMC
- Concerta XL: Summary of Product Characteristics. eMC
- Prescribing and switching between modified-release methylphenidate. NHS Specialist Pharmacy Service
This page is written for educational purposes and does not constitute medical advice. Always follow the guidance of your prescriber or pharmacist. If you have concerns about your medication, contact your clinical team.
About this page
- Written and clinically reviewed by
- Adam OdusholaADHD Advanced Practitioner and Clinical Prescribing Pharmacist
- First published
- Last updated
- Last reviewed
- Next review
“Last updated” is when the content last changed. “Last reviewed” is when it was last checked against current sources.
How this content is written, sourced and checked: editorial policy
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