Triglycerides 500 or higher mg/dL

A triglyceride of 500 mg/dL or higher is very high in ATP III's 2001 classification, and pancreatitis enters the picture. ATP III's first aim here was "to prevent acute pancreatitis through triglyceride lowering." The 2026 ACC/AHA guideline calls it severe hypertriglyceridemia and splits it at 1000: "The risk of acute pancreatitis increases with TG levels ≥500 mg/dL and is particularly high with TG levels ≥1000 mg/dL."

When to seek care. No document behind this page names a triglyceride number that alone calls for emergency or same-day care. NIDDK's pancreatitis pages (NIH, last reviewed November 2017) put the urgency on symptoms: "People with acute pancreatitis usually look and feel seriously ill and need to see a doctor right away." The main symptom: upper abdominal pain that may spread to the back. Seek care right away, NIDDK says, for these signs of severe pancreatitis: severe or worsening pain or tenderness in the abdomen, nausea and vomiting, fever or chills, a fast heartbeat, shortness of breath, or yellowing of the skin or the whites of the eyes.

500 to 999 versus 1000 or higher. Below 1000, statins "remain first-line therapy for patients with TG ≥500 mg/dL to reduce ASCVD risk even though they reduce TG less than fibrates or omega-3 fatty acids." ASCVD is atherosclerotic cardiovascular disease. The Class 1 diet for 500 to 999 is low in added sugar, refined carbohydrates and saturated fat, "with no alcohol and individualized limitation of total fat". At 1000 or higher the order flips: "initial priority should be given to lowering TG to reduce the risk of pancreatitis." The diet becomes "very low in total fat and refined carbohydrates, with elimination of alcohol and added sugars", fat is held to "10%-15% of calories from fat" until chylomicrons clear, and referral to a registered dietitian nutritionist "is recommended" (Class 1).

Workup and medicines. The guideline asks for "a thorough reassessment for secondary causes", and genetic testing for rare variants "should be considered" to rule out familial or multifactorial chylomicronemia syndrome. If triglycerides stay at 500 or higher despite diet, adding a fibrate or a prescription omega-3 "is reasonable to lower TG levels and reduce the risk of pancreatitis" (Class 2a). Fenofibrate is preferred, and "gemfibrozil is not recommended". Table 5 on fish oil: "Nonprescription fish oil supplements are not equivalent to, or considered prescription medications, and have variable fatty acid content". The guideline recommends olezarsen (Class 1) for familial chylomicronemia syndrome with a fasting 1000 or higher, and Table 9 lists severe primary cases, once secondary causes are ruled out, for lipid-specialist referral.

If the sample was nonfasting. Section 3.2: once a nonfasting result reaches 400 or higher, "a fasting lipid profile should be performed".