Thyroid cont ion w/ high triglycerides...any suggestions for getting it lower?

I am being medicated for a hypothyroidism. I got test results today that show that my thyroid is getting back to normal but my triglycerides are at 255. My colesteral is fine. I try to eat a low fat diet (been rough with the holidays) and don't eat a lot of sweets. I don't want to go on more medication. Any suggestions? My doctor mentioned some drug that blocks fat? What would they put you on to reduce your triglycerides?