When it comes to ADHD medication, there is no single option that works best for everyone. Several different medications are available in Australia, each with distinct characteristics that make them more or less suitable depending on the individual. Understanding the differences can help you have more productive conversations with your prescribing doctor.
This article provides a factual comparison of ADHD medications available in Australia. It is not a recommendation for any specific treatment. All medication decisions should be made with your healthcare team.
Categories of ADHD Medication
ADHD medications available in Australia fall into two main categories:
Stimulant Medications
Stimulants are the most commonly prescribed ADHD medications and have the most extensive evidence base. They work by increasing the availability of dopamine and norepinephrine in the brain.
Non-Stimulant Medications
Non-stimulants work through different mechanisms and may be preferred when stimulants are not suitable, not effective, or cause intolerable side effects.
Methylphenidate-Based Medications
Methylphenidate is available in several formulations in Australia:
Ritalin (Immediate-Release)
- Active ingredient: Methylphenidate hydrochloride
- Duration of action: Approximately 3-4 hours
- Dosing: Usually taken 2-3 times daily
- Advantages: Flexible dosing, quick onset (30-60 minutes), allows fine-tuning of when effects are needed, lower cost per tablet
- Considerations: Requires multiple daily doses, effects can be inconsistent as the medication peaks and troughs throughout the day
Ritalin LA (Extended-Release)
- Active ingredient: Methylphenidate hydrochloride in a modified-release capsule
- Duration of action: Approximately 8 hours
- Dosing: Once daily in the morning
- Advantages: Single morning dose, more consistent symptom coverage during the day, capsule can be opened and sprinkled on food
- Considerations: Less flexibility for adjusting coverage later in the day, may not last long enough for evening activities
Concerta (Extended-Release OROS)
- Active ingredient: Methylphenidate hydrochloride using OROS (Osmotic-Controlled Release Oral Delivery System)
- Duration of action: Approximately 12 hours
- Dosing: Once daily in the morning
- Advantages: Long duration provides coverage for a full working or school day, steady release profile reduces peaks and troughs
- Considerations: Cannot be cut or crushed, longer duration means effects may interfere with evening appetite or sleep in some people, the non-absorbable shell may be visible in stool (this is normal)
Amphetamine-Based Medications
Dexamfetamine (Immediate-Release)
- Active ingredient: Dexamfetamine sulfate
- Duration of action: Approximately 3-5 hours
- Dosing: Usually taken 2-3 times daily
- Advantages: Well-established medication with decades of use, flexible dosing, may work for people who do not respond well to methylphenidate
- Considerations: Requires multiple daily doses, Schedule 8 controlled substance with strict dispensing rules
Vyvanse (Lisdexamfetamine)
- Active ingredient: Lisdexamfetamine dimesylate (a prodrug that is converted to dexamfetamine in the body)
- Duration of action: Approximately 10-14 hours
- Dosing: Once daily in the morning
- Advantages: Long duration, smooth onset and offset, prodrug design means it must be metabolised before becoming active (which may reduce potential for misuse), available in multiple strengths for precise dosing
- Considerations: Long duration means it cannot be “topped up” with a second dose easily, may affect sleep in some people, generally more expensive than immediate-release options
Non-Stimulant Medications
Strattera (Atomoxetine)
- Active ingredient: Atomoxetine hydrochloride
- Mechanism: Selective norepinephrine reuptake inhibitor
- Duration of action: Continuous (taken daily to maintain therapeutic levels)
- Dosing: Once or twice daily
- Advantages: Not a stimulant, so not a controlled substance and may have lower risk of misuse; provides 24-hour symptom coverage; may be particularly helpful for co-occurring anxiety; does not worsen tic disorders
- Considerations: Takes 4-6 weeks to reach full effect (unlike stimulants which work on the same day); may be less effective than stimulants for some people; side effects can include nausea, decreased appetite, and mood changes during the adjustment period
Intuniv (Guanfacine Extended-Release)
- Active ingredient: Guanfacine hydrochloride
- Mechanism: Alpha-2A adrenergic agonist
- Duration of action: Continuous (taken daily)
- Dosing: Once daily
- Advantages: Non-stimulant option; may be particularly helpful for hyperactivity and impulsivity; can be used as an add-on to stimulant medication; may help with emotional dysregulation; does not worsen tics
- Considerations: May cause sedation, especially when starting; can lower blood pressure; takes several weeks to reach full effect; must be tapered gradually if discontinuing (do not stop suddenly)
How Doctors Choose Between Medications
Prescribing doctors consider multiple factors when recommending an ADHD medication:
- Symptom profile — which symptoms are most prominent (inattention vs hyperactivity vs impulsivity)
- Duration of coverage needed — does the person need coverage for school or work hours only, or for evening activities as well
- Co-occurring conditions — anxiety, depression, tic disorders, substance use history, and cardiovascular health all influence medication choice
- Previous medication trials — what has been tried before and how the person responded
- Individual response — some people respond better to methylphenidate, others to amphetamines, and predicting which will work best for a specific person is not always possible
- Side effect profile — which potential side effects are most concerning for the individual
- Practical considerations — ability to remember multiple daily doses, cost, and access to specialist prescribers
- Patient preference — the person’s own values, concerns, and treatment goals
The Trial-and-Error Process
It is common for the first medication tried not to be the best option. Finding the right medication and dose is often a process of careful trial and adjustment. Your doctor may:
- Start with one medication at a low dose
- Gradually increase the dose while monitoring effects and side effects
- Switch to a different medication if the first does not work well
- Try combining medications in some cases
- Adjust the treatment plan as your needs change over time
This process requires patience and open communication with your prescribing doctor. Keeping a daily log of how you feel at different times of day can be extremely helpful.
Important Reminders
- No medication is “better” than another in absolute terms — the best medication is the one that works best for you with the fewest side effects
- Medication is most effective as part of a comprehensive treatment plan that includes non-medication strategies
- Never change your medication without discussing it with your prescribing doctor
- Do not compare your medication experience to others’ — individual responses vary significantly
- All ADHD medications in Australia are subject to regulatory oversight by the TGA
Support Services
If you have questions about ADHD treatment options:
- ADHD Australia: adhdaustralia.org.au — information and support
- Beyond Blue: 1300 22 4636 — mental health support, available 24/7
- Lifeline: 13 11 14 — crisis support, available 24/7
This article provides general information only and is not a substitute for professional medical advice. Medication decisions should always be made in consultation with your prescribing doctor based on your individual circumstances.