I, too, was diagnosed with high blood preesure (HBP) when I was young. Made it through life until I was 30 years old with no meds. Then I moved to Mdsn, WI, which has a very active medical program/university. I was put on meds. One med led to another med to another med to another... None of the meds actually helped regulate my HBP. They just made my body very, very sick.
When I turned 40 years old four years ago, I became horribly sick. My blood pressure shot sky high. My cardiologist couldn't figure out why--he just kept adjusting my meds. When I pushed for him to actually find out WHY I was so sick and what had caused it, instead of helping me, he kicked me out of the clinic! I suppose I wasn't a dutiful enough client who "just went along with taking meds and not asking questions."
I went to alternative healthcare and started seeing a naturopath. Found out I had severe heavy metal toxicity. I detoxed. Also discovered I had severe malabsorption and was severely nutrient depleted; I took (and am still taking) various minerals, vitamins, enzymes, and amino acids. Like LovingLife, I discovered that I have casein allergy, soy and gluten intolerance--and intolerance to 21 others foods. So I modified my diet to stay away from those foods. Ate my veges.
Still had issues.
I changed healthcare providers when we changed health insurance companies and actually found an allopathic doctor who at least is willing to help me stay healthy. I had discovered that I have a liver issue that doesn't allow my body to detox or metabolize correctly; Pharma drugs are OFF LIMITS to me. She asked me if I drink pop; I said I was off diet, but was still drinking regular. She told me to QUIT drinking pop. I did, and have officially been "pop free" since March of 2012.
Wow! What a DIFFERENCE it made! My overall blood pressure went way down. I'm also watching how much overall caffeine I'm taking in (in tea and chocolate). AND I discovered that hibiscus tea helps lower blood pressure. I found one with pineapple, apple, and stevia right in the bags. It is SO GOOD iced! And it tastes good hot as well.
I also use a variety of different herbs and homeopathic remedies to help in lowering and balancing my blood pressure.
The biggest difference, though, has been in changing my family's diet over to organic. We rarely eat any fast food or processed food, and the restaurants we do eat at, we've checked to make sure the foods we eat are compatible to what we can eat (i.e., allergen-free, organic or farmer's market produce, local ma & pa owned restaurants, etc.).
The best thing you can do for your daughter is, when you get back Stateside, take her to see a naturopathic doctor and have him run a full diagnostic work up on your daughter. He will be able to tell what your daughter is deficient in, what she's allergic/intolerant to, and any other areas her little body might be out of whack in. He will be able to help you get her body healthy--and her blood pressure should come back down to normal.
It's better to find out now what the issues/problem areas are so that she can be healthy. When you get to be 40 years old before you find the actual problems, well, it takes a long time to get the body healed and healthy again. It's been four years, and I'm still working on it.