Prolonged-release methylphenidate tablet side effects
Concerta XL · Xaggitin XL · Affenid XL · Xenidate XL · Delmosart
Select a medication
Methylphenidate: IR and XL capsules
100% IR
Methylphenidate IR
Methylphenidate (generic) · Ritalin
Duration 4 hrs per dose
50:50 XL
Medikinet XL
Methylphenidate · modified-release capsule
Duration up to 8 hrs
50:50 XL
Meflynate XL
Methylphenidate · modified-release capsule
Duration up to 8 hrs
50:50 XL
Ritalin XL
Methylphenidate · modified-release capsule
Duration up to 8 hrs
30:70 XL
Equasym XL
Methylphenidate · modified-release capsule
Duration up to 8 hrs
Methylphenidate: XL tablets
OROS 22:78
Concerta XL
Methylphenidate · prolonged-release tablet
Duration up to 12 hrs
25:75 XL
Xaggitin XL
Methylphenidate · prolonged-release tablet
Duration up to 12 hrs
XL tablet
Affenid XL
Methylphenidate · prolonged-release tablet
Duration up to 12 hrs
XL tablet
Xenidate XL
Methylphenidate · prolonged-release tablet
Duration up to 12 hrs
XL tablet
Delmosart
Methylphenidate · prolonged-release tablet
Duration up to 12 hrs
Filter:
Durationup to 12 hrs
Onset~30–60 mins
Doses
18mg27mg36mg54mg
Concerta uses OROS technology: water enters the tablet, activates a push compartment, and drives drug out at a controlled rate. Creates a gently ascending effect: coverage builds across the day. Must NOT be crushed, chewed, or split. The tablet shell is expelled intact in the stool; this is completely normal.
This guide covers common, everyday side effects. See the full list of Concerta XL side effects, including rarer ones
What helps
- Take in the morning: 8–12 hour duration means late dosing directly affects sleep
- The ascending OROS profile means the effect builds through the day rather than peaking early
- Wind-down routine from 9pm; no caffeine after midday
DiscussSleep problems past 2–3 weeks are a review conversation: Concerta's long duration makes dose timing particularly important.
What helps
- The OROS mechanism produces one of the smoothest wear-offs of all methylphenidate formulations
- An evening dip is still normal but tends to be gentler than bead-based or IR formulations
ExpectedConcerta's smooth OROS profile means wear-off is one of its advantages: rebound tends to be milder.
What helps
- Because the OROS profile is ascending, the wear-off typically begins in the late afternoon/early evening
- The smoother descent means rebound tends to be milder than with 50:50 or IR formulations
- Note timing and mention at review if daily or affecting relationships
DiscussIf rebound is significant despite the OROS smooth profile, discuss at your next review.
What helps
- The ascending OROS profile means appetite suppression builds across the morning rather than hitting immediately
- Eat a good breakfast before the medication fully activates
- Do not crush, chew, or split Concerta XL: the OROS mechanism depends on the tablet remaining intact
- The tablet shell is expelled in the stool; this is completely normal and expected
DiscussSignificant unintended weight loss should be raised at your next review.
What helps
- An expected pharmacological effect: monitored at every review
WatchChest pain, irregular heartbeat, or sudden dizziness: contact your prescriber promptly.
What helps
- Hydration is the primary fix: aim for 6–8 glasses of water daily
- Paracetamol or ibuprofen are safe alongside Concerta XL
ExpectedUsually settles within the first 2 weeks.
What helps
- Take with food where possible
- Never crush or split the tablet: the OROS mechanism is destroyed and all medication releases at once
ExpectedGI side effects tend to be milder with the gradual OROS release profile.
Durationup to 12 hrs
Onset~30–60 mins
Doses
18mg27mg36mg54mg
Prolonged-release tablet: approximately 25% of the dose releases in the first 1–2 hours; the remaining 75% is released gradually over the following hours. Swallow whole with water. With or without food. Do not crush, break, chew, or cut the tablet.
This guide covers common, everyday side effects. See the full list of Xaggitin XL side effects, including rarer ones
What helps
- Take in the morning: 8–12 hour duration means late dosing directly affects sleep
- The ascending release profile means the effect builds through the day rather than peaking early
- Wind-down routine from 9pm; no caffeine after midday
DiscussSleep problems past 2–3 weeks are a review conversation: Xaggitin XL's long duration makes dose timing particularly important.
What helps
- The prolonged-release mechanism produces one of the smoothest wear-offs of all methylphenidate formulations
- An evening dip is still normal but tends to be gentler than bead-based or IR formulations
ExpectedXaggitin XL's smooth prolonged-release profile means wear-off is one of its advantages: rebound tends to be milder.
What helps
- Because the release profile is ascending, the wear-off typically begins in the late afternoon/early evening
- The smoother descent means rebound tends to be milder than with 50:50 or IR formulations
- Note timing and mention at review if daily or affecting relationships
DiscussIf rebound is significant despite the smooth prolonged-release profile, discuss at your next review.
What helps
- The ascending release profile means appetite suppression builds across the morning rather than hitting immediately
- Eat a good breakfast before the medication fully activates
- Do not crush, chew, or split Xaggitin XL: the prolonged-release mechanism depends on the tablet remaining intact
- The tablet shell is expelled in the stool; this is completely normal and expected
DiscussSignificant unintended weight loss should be raised at your next review.
What helps
- An expected pharmacological effect: monitored at every review
WatchChest pain, irregular heartbeat, or sudden dizziness: contact your prescriber promptly.
What helps
- Hydration is the primary fix: aim for 6–8 glasses of water daily
- Paracetamol or ibuprofen are safe alongside Xaggitin XL
ExpectedUsually settles within the first 2 weeks.
What helps
- Take with food where possible
- Never crush or split the tablet: the prolonged-release mechanism is destroyed and all medication releases at once
ExpectedGI side effects tend to be milder with the gradual prolonged-release profile.
Durationup to 12 hrs
Onset~30–60 mins
Doses
18mg27mg36mg54mg
Prolonged-release tablet: approximately 22% of the dose releases in the first 1–2 hours; the remainder is released gradually over the following 6–8 hours. Swallow whole with water. With or without food. Do not crush, break, chew, or cut the tablet.
This guide covers common, everyday side effects. See the full list of Affenid XL side effects, including rarer ones
What helps
- Take in the morning: 8–12 hour duration means late dosing directly affects sleep
- The ascending release profile means the effect builds through the day rather than peaking early
- Wind-down routine from 9pm; no caffeine after midday
DiscussSleep problems past 2–3 weeks are a review conversation: Affenid XL's long duration makes dose timing particularly important.
What helps
- The prolonged-release mechanism produces one of the smoothest wear-offs of all methylphenidate formulations
- An evening dip is still normal but tends to be gentler than bead-based or IR formulations
ExpectedAffenid XL's smooth prolonged-release profile means wear-off is one of its advantages: rebound tends to be milder.
What helps
- Because the release profile is ascending, the wear-off typically begins in the late afternoon/early evening
- The smoother descent means rebound tends to be milder than with 50:50 or IR formulations
- Note timing and mention at review if daily or affecting relationships
DiscussIf rebound is significant despite the smooth prolonged-release profile, discuss at your next review.
What helps
- The ascending release profile means appetite suppression builds across the morning rather than hitting immediately
- Eat a good breakfast before the medication fully activates
- Do not crush, chew, or split Affenid XL: the prolonged-release mechanism depends on the tablet remaining intact
- The tablet shell is expelled in the stool; this is completely normal and expected
DiscussSignificant unintended weight loss should be raised at your next review.
What helps
- An expected pharmacological effect: monitored at every review
WatchChest pain, irregular heartbeat, or sudden dizziness: contact your prescriber promptly.
What helps
- Hydration is the primary fix: aim for 6–8 glasses of water daily
- Paracetamol or ibuprofen are safe alongside Affenid XL
ExpectedUsually settles within the first 2 weeks.
What helps
- Take with food where possible
- Never crush or split the tablet: the prolonged-release mechanism is destroyed and all medication releases at once
ExpectedGI side effects tend to be milder with the gradual prolonged-release profile.
Durationup to 12 hrs
Onset~30–60 mins
Doses
18mg27mg36mg54mg
Prolonged-release tablet: approximately 22% of the dose releases in the first 1–2 hours; the remainder is released gradually over the following 6–8 hours. Swallow whole with water. With or without food. Do not crush, break, chew, or cut the tablet.
This guide covers common, everyday side effects. See the full list of Xenidate XL side effects, including rarer ones
What helps
- Take in the morning: 8–12 hour duration means late dosing directly affects sleep
- The ascending release profile means the effect builds through the day rather than peaking early
- Wind-down routine from 9pm; no caffeine after midday
DiscussSleep problems past 2–3 weeks are a review conversation: Xenidate XL's long duration makes dose timing particularly important.
What helps
- The prolonged-release mechanism produces one of the smoothest wear-offs of all methylphenidate formulations
- An evening dip is still normal but tends to be gentler than bead-based or IR formulations
ExpectedXenidate XL's smooth prolonged-release profile means wear-off is one of its advantages: rebound tends to be milder.
What helps
- Because the release profile is ascending, the wear-off typically begins in the late afternoon/early evening
- The smoother descent means rebound tends to be milder than with 50:50 or IR formulations
- Note timing and mention at review if daily or affecting relationships
DiscussIf rebound is significant despite the smooth prolonged-release profile, discuss at your next review.
What helps
- The ascending release profile means appetite suppression builds across the morning rather than hitting immediately
- Eat a good breakfast before the medication fully activates
- Do not crush, chew, or split Xenidate XL: the prolonged-release mechanism depends on the tablet remaining intact
- The tablet shell is expelled in the stool; this is completely normal and expected
DiscussSignificant unintended weight loss should be raised at your next review.
What helps
- An expected pharmacological effect: monitored at every review
WatchChest pain, irregular heartbeat, or sudden dizziness: contact your prescriber promptly.
What helps
- Hydration is the primary fix: aim for 6–8 glasses of water daily
- Paracetamol or ibuprofen are safe alongside Xenidate XL
ExpectedUsually settles within the first 2 weeks.
What helps
- Take with food where possible
- Never crush or split the tablet: the prolonged-release mechanism is destroyed and all medication releases at once
ExpectedGI side effects tend to be milder with the gradual prolonged-release profile.
Durationup to 12 hrs
Onset~30–60 mins
Doses
18mg27mg36mg54mg
Prolonged-release tablet: a portion of the dose releases in the first 1–2 hours; the remainder is released gradually over the following hours. Swallow whole with water. With or without food. Do not crush, break, chew, or cut the tablet.
This guide covers common, everyday side effects. See the full list of Delmosart side effects, including rarer ones
What helps
- Take in the morning: 8–12 hour duration means late dosing directly affects sleep
- The ascending release profile means the effect builds through the day rather than peaking early
- Wind-down routine from 9pm; no caffeine after midday
DiscussSleep problems past 2–3 weeks are a review conversation: Delmosart's long duration makes dose timing particularly important.
What helps
- The prolonged-release mechanism produces one of the smoothest wear-offs of all methylphenidate formulations
- An evening dip is still normal but tends to be gentler than bead-based or IR formulations
ExpectedDelmosart's smooth prolonged-release profile means wear-off is one of its advantages: rebound tends to be milder.
What helps
- Because the release profile is ascending, the wear-off typically begins in the late afternoon/early evening
- The smoother descent means rebound tends to be milder than with 50:50 or IR formulations
- Note timing and mention at review if daily or affecting relationships
DiscussIf rebound is significant despite the smooth prolonged-release profile, discuss at your next review.
What helps
- The ascending release profile means appetite suppression builds across the morning rather than hitting immediately
- Eat a good breakfast before the medication fully activates
- Do not crush, chew, or split Delmosart: the prolonged-release mechanism depends on the tablet remaining intact
- The tablet shell is expelled in the stool; this is completely normal and expected
DiscussSignificant unintended weight loss should be raised at your next review.
What helps
- An expected pharmacological effect: monitored at every review
WatchChest pain, irregular heartbeat, or sudden dizziness: contact your prescriber promptly.
What helps
- Hydration is the primary fix: aim for 6–8 glasses of water daily
- Paracetamol or ibuprofen are safe alongside Delmosart
ExpectedUsually settles within the first 2 weeks.
What helps
- Take with food where possible
- Never crush or split the tablet: the prolonged-release mechanism is destroyed and all medication releases at once
ExpectedGI side effects tend to be milder with the gradual prolonged-release profile.
When to speak to your prescriber
Use this guide for any ADHD medication. When in doubt: always make the call.
Green No action needed
- Reduced appetite during the day
- Mild headache in the first week
- Dry mouth
- Feeling more talkative or energised
- Nausea in the first 1–2 weeks
- Mild sleep difficulty while dose timing settles
- Emotional dip as medication wears off (rebound)
- Some stomach discomfort in the first days
Amber Raise at your next review
- Sleep problems persisting past 2–3 weeks
- Significant weight loss or consistent inability to eat
- Feeling emotionally blunted or not yourself
- Low mood, anxiety, or tearfulness
- Irritability affecting relationships or daily life
- New or worsening tics
- Persistent headaches beyond two weeks
- Anxiety that doesn't settle after week 2
Red Urgent: don't wait
- Chest pain, tightness, or irregular heartbeat
- Severe shortness of breath
- Signs of very high blood pressure: severe headache, vision changes, confusion
- Hallucinations or loss of touch with reality
- Thoughts of self-harm or suicide
- Seizures with no prior history
- Allergic reaction: rash, swelling of face/lips/throat, difficulty breathing
Important note: Concerta XL (OROS formulation)
- Never crush, chew, or split Concerta XL tablets: the OROS mechanism depends on the tablet remaining intact
- The tablet shell (white/orange casing) is expelled intact in the stool; this is completely normal and expected. The medication is still fully delivered
Important note: Xaggitin XL (prolonged-release tablet)
- Never crush, chew, or split Xaggitin XL tablets: the prolonged-release mechanism depends on the tablet remaining intact
- The tablet shell is expelled intact in the stool; this is completely normal and expected. The medication is still fully delivered
Important note: Affenid XL (prolonged-release tablet)
- Never crush, chew, or split Affenid XL tablets: the prolonged-release mechanism depends on the tablet remaining intact
- The tablet shell is expelled intact in the stool; this is completely normal and expected. The medication is still fully delivered
Important note: Xenidate XL (prolonged-release tablet)
- Never crush, chew, or split Xenidate XL tablets: the prolonged-release mechanism depends on the tablet remaining intact
- The tablet shell is expelled intact in the stool; this is completely normal and expected. The medication is still fully delivered
Important note: Delmosart (prolonged-release tablet)
- Never crush, chew, or split Delmosart tablets: the prolonged-release mechanism depends on the tablet remaining intact
- The tablet shell is expelled intact in the stool; this is completely normal and expected. The medication is still fully delivered
For anything in the red column, or if something just feels very wrong: contact your clinical team or NHS 111 today. In an emergency call 999.
You will never be in trouble for checking.
Info
This guide is for general information only. It does not replace medical advice. Always follow your prescriber or pharmacist. Information is UK-based and aligned with NICE guidelines. © 2026 ADHDnotepad: clinician-authored.