Hello Thank you for asking the question. You are on treatment of drug adderall which is used in treatment of narcolepsy and ADHD disorder. Side effect of adderall are mainly nausea, insomnia, headache, etc. There is no side effect like swelling of legs. As per your description you are a patient of IDDM. In diabetes mellitus common complication is kidney damage. In kidney disease there is damage to filtration membrane leads to loss of protein albumin. So possibility of edema is due to low albumin. So my advice is consult a doctor and do a kidney test to detect blood and urinary albumin level. Hope this will helpful to you.