Final answer:
The best advice for a 50-year-old patient with new onset constipation, weight loss, and rectal bleeding is to seek medical attention for further evaluation and testing.
Step-by-step explanation:
The best advice to give a 50-year-old patient with new onset of constipation, 15-pound weight loss over several months, and a small amount of rectal bleeding is to seek medical attention as soon as possible.
These symptoms can be indications of colorectal cancer, especially in individuals over the age of 50. The patient should talk to a healthcare professional who can recommend appropriate tests, such as a colonoscopy, and evaluate the symptoms further.