If you follow healthy life styles (salad, low carb, exercise and 8 hrs professional work --less stress full job, full 8 hrs sleep, no alcohol/churot) and still you have too high triglyceride then might be genetic (DNA based)
Just follow good lifestyle and avoid medication .
I had slight higher triglyceride (around 200 ) doctor said eat low carb and exercise
No worry it will down within few months (if you heavy rice eater(kahsiko masu bhat yekthal )please stop it.