Concerta (Methylphenidate ER)
Concerta is an extended-release form of methylphenidate used to treat ADHD, giving once-daily dosing that lasts through the day. At HealthDeliver Clinic, patients already prescribed Concerta can consult a doctor and refill their prescription in Bangkok, with proper medical review at every step.
Who this refill service is for
This is a prescription Medication-refill service for patients who have already been diagnosed with ADHD and prescribed Concerta, and who need to continue their treatment while in Thailand. A doctor consultation and assessment is required before any medication is dispensed. Methylphenidate is a controlled medication — we do not supply it without medical review and a valid clinical need.
What is Concerta?
Concerta is a long-acting formulation of methylphenidate, the same active ingredient found in Ritalin. What makes Concerta different is its OROS (osmotic-release) delivery system: the tablet releases methylphenidate gradually over the course of the day, so a single morning dose provides steady symptom control without the need for repeat doses. This makes it a convenient option for people who prefer once-daily treatment over the multiple daily doses required with immediate-release methylphenidate.
How Concerta differs from immediate-release methylphenidate
- Once-daily dosing — one tablet in the morning, rather than 2–3 doses through the day
- Steady release — the OROS system delivers the medication gradually, avoiding the peaks and troughs of immediate-release tablets
- Convenience — no need to take a dose at work or school midday
Your doctor will advise whether extended-release Concerta or immediate-release methylphenidate (such as Ritalin) is more appropriate for you.
How it’s taken
Concerta is taken once daily in the morning, swallowed whole with water — the tablet must not be crushed, chewed, or split, as this breaks the extended-release mechanism. Always follow your doctor’s prescription for the correct dose and timing; do not adjust it yourself.
Possible side effects
Common: reduced appetite, difficulty sleeping, headache, dry mouth, increased heart rate.
Less common but serious: chest pain, breathing difficulty, mood changes, signs of circulation problems. Seek medical help immediately if these occur.
Precautions
Methylphenidate is a controlled medication with a potential for misuse and dependency, and must be taken exactly as prescribed. Tell your doctor about any history of heart conditions, high blood pressure, anxiety, or previous substance use. Regular reviews are recommended to monitor your response and any side effects.
✅ Key Details: Concerta (Methylphenidate ER)
- What is it used for? Treats Attention Deficit Hyperactivity Disorder (ADHD) with a single once-daily dose that provides symptom control throughout the day.
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- Dosage strength: Commonly available as 18mg, 27mg, 36mg, and 54mg extended-release tablets. Dosing is individual and set by your doctor.
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- Prescription required? Yes – methylphenidate is a controlled medication and must be prescribed by a qualified healthcare provider.
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- Availability: Dispensed in-clinic following a doctor consultation and review of your existing treatment.
Frequently Asked Questions About Concerta
What's the difference between Concerta and Ritalin?
Both contain methylphenidate. Concerta is extended-release (once daily); Ritalin is immediate-release (taken several times a day). Your doctor can advise which suits you.
Can I refill my Concerta prescription in Bangkok?
Yes, after a doctor consultation to review your diagnosis and existing treatment. Bring any prescription or medical documentation you have.
Is methylphenidate legal in Thailand?
Yes, as a prescription-only controlled medication, dispensed under medical supervision. It cannot be obtained without a valid prescription.
Can I split or crush a Concerta tablet?
No. It must be swallowed whole — crushing or splitting it breaks the extended-release system and can release the full dose at once.
Safe and doctor supervised prescribing
All prescription refills are reviewed by our doctors in line with Thai medical regulations.
If required, we may recommend consultation or updated blood tests to ensure your treatment remains safe and appropriate.
Medically Reviewed By: Dr. Beam
