The good news is that your GP clearly doesn't like statins.
Zetia has recently been shown to not have a positive clinical outcome, so I'm not surprised you were taken off it. According to Davis (just check Grizz' sig ) Niaspan too is ineffective. It is a slow release form of niacin.
However, your numbers have improved in two respects - increased HDL and decreased, if only marginally, Trigs. LDL is the joker here. Without a subfraction and lipid profile test it really doesn't tell you anything. Also, yours has been calculated not measured so must be taken with a grain of salt. Next time ask for a VAP test to get the subfractions and lipid profile
If you want to push up the HDL higher, increase your saturated fat intake and talk to your GP about nicotinic acid. It causes flushing, but I find it isn't a problem and passes quickly. My HDL is over a hundred on 3000mg of nicotinic acid a day (52, proven artherosclerosis)
Four years Primal with influences from Jaminet & Shanahan and a focus on being anti-inflammatory. Using Primal to treat CVD and prevent stents from blocking free of drugs.
Eat creatures nose-to-tail (animal, fowl, fish, crustacea, molluscs), a large variety of vegetables (raw, cooked and fermented, including safe starches), dairy (cheese & yoghurt), occasional fruit, cocoa, turmeric & red wine