Hi Ripped,
I've been on HRT (Sustanon 250xe2weeks) for nearly 12 years. I'm 42, and strangely enough...5'9" and hovering around 195Ibs.
As a result of therapy I became hypertensive and it's currently controlled by Amlodapine (increases elasticity of the arteries), and Bisoprolol (Betablocker). AAS by and large increase the amount of red blood cells in circulation, and this rise along with increased viscosity of the cells, can cause a rise in blood pressure.
As Stevesmi says, reducing your intake of red meat and saturated fats, and increasing the amount of all manner of vegetables and fruit, will go some way to help reduce BP. Also try to cut down - or totally eliminate - the amount of salt in your diet. Salt alone is a large contributor to hypertension. Personally, I use a 75mg/day intake of aspirin to help thin the blood and reduce the stickiness of platelets and RBC's. The main danger, apart from tolerance to pain warning signs, is the detrimental effect aspirin may have on your stomach. It's known to cause internal bleeding and acid reflux in some people. With this in mind it might be useful to have some antacids on hand to combat symptoms of heartburn/indigestion, should the occur.
Flaxseed Oil, Fish Oils or other Omega 3 foods or supplements can also help by reducing or controlling the levels of LDL/VLDL cholesterol in your blood. Over time the bad cholesterols can form plaques in the lumen of your arteries which causes blood flow to become restricted and under pressure: It's called hypercholesteronaemia, I think.
Another solution, if your blood returns show increased RBC count, is a venosection. This is essentially the same type of process that's used when you donate blood. They simply drain a pint or so of blood from you every so often to lower the amount of volume and RBC in circulation. I'm currently awaiting a decision on this happening with my GP. Obviously, you'd need to see a specialist or physician to agree to this.