<s>[INST] Hi, I had a clumpy bm today. part was Brown, but other parts were solid clayish white. I ve also just gotten out of the hospital for what was chalked up to possible seizures due to a reaction of having a partial thyroidectomy and taking prescription Ritalin. Could the stool have any relation? should I be worried? [/INST] Hello, I will suggest you to observe the clay color in stools. If problem persist you need to start workup with an ultrasound scan of liver and liver function testing. Ritalin has no such side effect. Also get serum calcium levels checked as there may be some problem with your parathyroid. Calcium deficiency may Express in form of seizures. Hope I have answered your question. Let me know if I can assist you further.  </s>