My triglyceride level is 392 - is a Fenofibrate 160mg + Rosuvastatin 20mg Tablet advisable to bring it down, and is it safe alongside multivitamin tablets?

A triglyceride level of 392 is definitely on the higher side and worth addressing, so it's good you're taking it seriously. This combination, pairing a cholesterol-lowering statin with a triglyceride-lowering agent, is commonly prescribed for exactly this kind of profile and tends to work well alongside dietary changes. Taking it with a general multivitamin is usually fine, but mention all your supplements to your doctor so they can check for interactions and keep your dose and follow-up lipid tests on track.