Positives

• POTS patients report Adderall improves wakefulness, focus, and brain fog while its norepinephrine-releasing action provides mild vasoconstriction that helps orthostatic tolerance The EDS Clinic.
  
  

Negatives

• Some patients describe Adderall paradoxically worsening their brain fog and producing rebound mental fatigue, especially at higher doses or with poor sleep Drugs.com.
  
  
• POTS patients on Adderall report that the heart-rate spike and tremor can intensify their tachycardia and trigger anxiety-like adrenergic surges Dysautonomia International.
  
  

Hurdles & Side Effects

• Many cardiologists refuse to clear POTS patients for Schedule II stimulants due to tachycardia concerns, blocking access even when patients have comorbid ADHD The EDS Clinic.