Half-life
~2-4.5 hours for the immediate-release form; the XR form lasts longer.
Withdrawal timeline
Because of the short half-life, a crash can begin the same day a dose is missed or the medication is stopped.
Fatigue, low mood, hunger, and oversleeping are most intense in the first few days.
The crash typically resolves within a week; ADHD symptoms persist as the baseline condition.
Common symptoms
- Fatigue and low energy
- Low mood
- Increased appetite
- Hypersomnia (oversleeping)
- Return of ADHD symptoms
Less common
- Irritability
- Difficulty concentrating
- Vivid dreams
Tapering guidance
- After regular use, stepping down (or moving to a longer-acting form first) can soften the crash; many patients can stop lower doses directly.
- Coordinate with the prescribing physician, particularly if there is co-occurring depression.
Where ketamine therapy fits
Ketamine therapy does not treat stimulant discontinuation, but the post-stimulant crash and underlying depression can overlap. Because stimulants raise heart rate and blood pressure and ketamine can do so transiently during a session, schedule sessions when stimulant levels are low (later in the day) and coordinate with the prescriber. See [ketamine for ADHD](/blog/ketamine-for-adhd).
Frequently asked questions
What is the Focalin crash?
A short period of fatigue, low mood, increased appetite, and oversleeping after stopping or as a dose wears off. It usually peaks in the first few days and resolves within a week.
Is Focalin physically addictive?
As a Schedule II stimulant it has abuse potential, but at prescribed doses it does not cause a dangerous physical withdrawal. The main effects of stopping are the crash and the return of ADHD symptoms.
Can I do ketamine therapy while on Focalin?
Yes, with timing and coordination. Schedule sessions when stimulant levels are low and let your prescriber manage the plan, since both can affect heart rate and blood pressure.
Important: This page is informational and does not constitute medical advice or a recommendation to start, stop, or change any medication. Tapering psychiatric medications should always be coordinated with the prescribing physician. Compounded ketamine for anxiety, depression, PTSD, and chronic pain is not FDA approved.
Browse all medication withdrawal guides.