Caution should also be exercised in a patient having intractable diarrhea or patients following a low-sodium diet. Physicians caring for patients must perform clinical and laboratory evaluations every 7 - 10 days for the first 2 months of ddI therapy. All high-risk patients (for example, patients with preexisting disorders of body systems known to be adversely affected by ddI, particularly those with a history of peripheral neuropathy, pancreatitis, seizure disorder, cardiac abnormalities, gout, and significant elevations of liver function test results), must have clinical and laboratory evaluations performed every 10 days and results submitted to Bristol-Myers Squibb on the case report forms provided.