Hello dear... Side effects of Adderall include dizziness, nervousness, headache and weight loss, decreased libido or sex drive,etc. The feeling of tightness in chest & breathlessness may be related to constriction & inflammation of airway passages...reason may be due to smoking. Nebulisation & steam inhalation will provide symptomatic relief in this regard. Or it can also be a warning sign of heart involvement. So...it will be better to consult a Doctor to prevent any deterioration in the condition. Wishing you a speedy recovery. Thanks & take care.