Welcome,
I'm assumig you're asking by keeping your other medicines the same, how can I reduce tri's, correct? It doesn't sound like you have the "junk food" component to worry about (like me

so you don't need to cut out doughnuts, candy, french fries . . . So, I would say from my experience 4 grams fish oil per day and red wine are two great reducers and help the heart and body in other ways. Also, SEE THE THREAD on Triglicerides and Natural Remedies.
Take Care and Good luck.