It's hard to find a circulatory system drug that doesn't have side
effects. You just have to experiment. I use a beta blocker
(atenolol), not primarily for HBP but for arrythmia but a very small
dose takes 10 points off BP. Only side effect is vivid dreams, not too
bad...;-)

Incidentally, the cholesterol theory of heart disease is pretty well
discredited these days. The cholesterol may actually be part of the
body's repair process for arteries damaged by unknown processes. Check
out www.thincs.org