Final answer:
The urine of a client with Parkinson's disease who is on levodopa may be brown or black. This is a common finding for clients on this medication.
Step-by-step explanation:
The urine of a client with Parkinson's disease who is on levodopa may have a brown or black color. This is a common finding for clients on this medication. The color of urine is determined mainly by the breakdown products of red blood cell destruction, and the substance responsible for the color of urine is urobilin or urochrome. Levodopa can cause the urine to become darker due to its effects on the liver and bile.