Final answer:
Overusing castor oil for constipation relief can cause diarrhea, abdominal pain, nausea, and potentially severe complications like intestinal obstruction and anemia.
Step-by-step explanation:
Regular ingestion of castor oil to relieve constipation can lead to multiple complications. The most common issues associated with its overuse include diarrhea, abdominal pain, and in severe cases, nausea and vomiting. However, chronic use may result in more serious health problems such as intestinal obstruction, anemia, allergic reactions, and dehydration. If dehydration becomes severe, it can lead to a drop in blood pressure and affect heart function. Patients with persistent adverse symptoms must seek medical attention.