Restarting Adderall at 20mg After One Week Off
Yes, the patient can restart at 20mg after being off Adderall for one week, but this depends on their previous stable dose and clinical context. If 20mg was their established therapeutic dose before stopping, they can resume at that dose. However, if they are treatment-naïve or were previously on a lower dose, they should restart at a lower dose and retitrate.
Clinical Decision Algorithm
If Previously Stable on 20mg or Higher:
- Resume at 20mg directly 1
- The one-week gap is insufficient to cause significant tolerance loss or require retitration
- No washout period is needed between stopping and restarting stimulants for ADHD 1
- Monitor for cardiovascular effects (blood pressure, heart rate) at follow-up 1
If Treatment-Naïve or Previously on Lower Doses:
- Start at 5mg of immediate-release amphetamine/dextroamphetamine 1
- For extended-release formulations: start at 10mg 2
- Titrate upward by 2.5-5mg increments weekly based on response 1
- Maximum doses typically reach 40mg daily for amphetamine salts 1
If Previously on 20mg Extended-Release:
- Can restart at 10mg and increase to 20mg after one week if concerned about tolerability 2
- Alternatively, resume at 20mg if previously well-tolerated
Critical Monitoring Points
Cardiovascular Assessment:
- Measure blood pressure and heart rate before restarting 1
- Amphetamines increase systolic BP by approximately 2mmHg and diastolic BP by 2mmHg 3
- Heart rate increases by approximately 4 beats per minute 3
- Single 25mg doses in naïve individuals cause systolic BP increases of 10mmHg and heart rate increases of 10 beats/min 4
Side Effect Surveillance:
- Common side effects: insomnia, decreased appetite, headache, irritability 1
- Assess for emergence of psychiatric symptoms (anxiety, agitation, mood changes) 1
- Monitor weight at each visit 1
Important Caveats
Physical Dependence Considerations: After one week off, withdrawal symptoms (dysphoric mood, fatigue, increased appetite) should have largely resolved 5. The brief discontinuation does not require extended retitration unless the patient experienced significant withdrawal or has new contraindications.
Abuse Potential: Verify the reason for the one-week gap. If related to diversion, misuse, or substance use concerns, a more cautious approach with lower starting doses and closer monitoring is warranted 1, 5.
Drug Interactions:
- Contraindicated with MAOIs or within 14 days of MAOI use 5
- Use caution with other serotonergic medications (SSRIs, SNRIs) due to serotonin syndrome risk 6, 5
- Avoid with sympathomimetics or in uncontrolled hypertension 7
Follow-Up Schedule
- Week 1-2: Phone contact to assess tolerability and side effects 1
- Week 4: Office visit with vital signs, symptom rating scales, and side effect assessment 1
- Monthly thereafter until symptoms stabilized 1
The key distinction is whether 20mg represents continuation of a previously effective dose versus initiation at a higher-than-recommended starting dose. Standard titration protocols recommend starting at 5mg for immediate-release or 10mg for extended-release formulations in treatment-naïve patients 1, 2.