Medicine During treatment for Wilson disease with trientine and penicillamine, free serum copper should be kept below which level? A 25 mcg/dl B 50 mcg/dl C 75 mcg/dl D 100 mcg/dl 💡 Explanation During treatment for Wilson disease with trientine and penicillamine, free serum copper should be kept below which level? ✓ Correct Answer: A. 25 mcg/dl