 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  of a certain substance (cystine) in the urine which can cause kidney stones. How to use Cuprimine Take this medication by mouth on an empty stomach (1 hour before or 2 hours after meals) as directed by your doctor. Take this medication at least 1 hour apart from other drugs (especially antacids), milk, or food. Dosage is based on your medical condition and response to treatment. Use this medication regularly to get the most benefit from it. To help you remember, take it at the same time(s) each day. Your doctor may also direct you to take vitamin B6 (pyridoxine) and iron. Follow your doctor's instructions carefully. If you need to take iron or other products that contain minerals (such as zinc), take it at least 2 hours before or after taking penicillamine. Consult your doctor before taking any products containing minerals since they may block the absorption of penicillamine. For the treatment of rheumatoid arthritis, it may take 2 to 3 months before you see any improvement in your condition. For the treatment of Wilson's disease, follow the diet recommended by your doctor to get the most benefit from this medication. Your condition may not improve for 1 to 3 months and may </s>