Hello, You have started taking your prescription medicine Adderall given to you by your treating doctor. You are experiencing passing of darker yellow urine. You are also having burning sensation on urination. You have been taking a lot of sodas, you are suggested to avoid taking it as it is not healthy. Since Adderall is likely to make you dehydrated, you are suggested to take water and fluid adequately. Taking less water will make your urine concentrated and more yellow than before. You have not mentioned what dose of Adderall you have been taking. High doses of Adderall may cause side effects like difficult, burning, or painful urination, frequent urge to urinate, bladder pain, etc. If you develop such symptoms consult your treating doctor. Adderall taken for a prolonged period commonly causes drug dependence. Misuse may cause serious cardiovascular adverse effects. Stay away from addictions if any. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician