Can medication withdrawal or “wearing off” cause energy crashes? 

Many people with ADHD notice a sharp drop in energy or mood when their medication wears off or is stopped suddenly. According to NHS guidance, these energy crashes , sometimes called “rebound” or withdrawal effects occur as stimulant or non-stimulant medication levels fall, leading to temporary reductions in dopamine and norepinephrine activity. This neurochemical drop can cause tiredness, irritability, and a sense of mental “flatness” until brain chemistry rebalances. 

Stimulant withdrawal and energy crashes 

Stimulant medications such as methylphenidate, lisdexamfetamine, and amphetamines work by boosting dopamine and norepinephrine, chemicals that drive motivation and alertness. When these levels drop rapidly, either from missed doses or the end of the drug’s active window, the sudden contrast can produce fatigue and mood dips. Clinical research in PMC, 2022 reports that individuals coming off stimulants may experience “dysphoric mood, fatigue, sleep disturbance, and agitation” during early withdrawal.  

Neurochemical changes and rebound symptoms 

When stimulants wear off, dopamine and norepinephrine signalling declines quickly, resulting in what’s often described as an “energy crash.” According to Healthline, this drop can make ADHD symptoms feel more intense than usual, sometimes accompanied by irritability and poor concentration. Extended-release medications reduce this effect by tapering the decline in blood levels more gradually than immediate-release versions. 

Differences between stimulant and non-stimulant withdrawal 

Non-stimulant medications such as atomoxetine, guanfacine, and clonidine generally cause milder energy fluctuations but must also be tapered carefully. Abruptly stopping them may lead to sleep disruption, low blood pressure, or fatigue. NICE and NHS protocols note that discontinuation should always be gradual and clinically supervised to minimise rebound or withdrawal effects (NICE NG87). 

Managing energy and withdrawal safely 

The NHS Shared Care Protocol recommends reducing stimulant doses by small increments each week to prevent fatigue and mood dips. Extended-release formulations, balanced meals, hydration, and consistent sleep schedules can also help stabilise energy during transitions. For individuals needing additional support, behavioural coaching programmes. 

Key takeaway 

Medication withdrawal or wear-off can cause temporary energy crashes because of sudden drops in dopamine and norepinephrine activity. With gradual tapering, extended-release formulations, and supportive routines, most people can manage these effects safely and maintain steadier energy throughout the day. 

Harriet Winslow, BSc

Author

Harriet Winslow is a clinical psychologist with a Bachelor’s in Clinical Psychology and extensive experience in behaviour therapy and developmental disorders. She has worked with children and adolescents with ADHD, autism spectrum disorder (ASD), learning disabilities, and behavioural challenges, providing individual and group therapy using evidence-based approaches such as CBT and DBT. Dr. Winslow has developed and implemented personalised treatment plans, conducted formal and informal assessments, and delivered crisis intervention for clients in need of urgent mental health care. Her expertise spans assessment, treatment planning, and behavioural intervention for both neurodevelopmental and mental health conditions.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy.

Dr. Rebecca Fernandez, MBBS

Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy.