There's a lot more to it than that
It certainly doesn't say that you can never draw any valid conclusions.
People sometimes use the fact that scientists have been wrong in the past to imply that scientists are wrong now. Certainly no discipline is perfect, but it's important to recognize that the state of scientific knowledge advances over time.
OK, I guess I'll bite again.
I actually do know the scientific process, but that really wasn't what I was challenging. I am questioning the input of big industry with regard to sudden changes in medical standards that conveniently define large blocks of the population as unhealthy enough to warrant daily medication.
Earlier comments suggested that there could be no profit motive for BP related drugs because they are $4 at Walmart.
Quick Google searches say.... well that isn't the whole story.
Here are some links to information that makes my point:
In 2004 alone Pfizer reported Norvasc revenue at $3.8B their second most profitable drug. This is a big number and it would be incredibly naive to think that there isn't any influence with those kinds of numbers.
http://www.forbes.com/2004/02/26/cx_mh_0226pfizerpatent.html
We all know there was a law suit that challenged Pfizers patent and generics hit the market around 2006ish.
BUT.... let's wind the tape back a little and see what studies prior to that time period defined the "new" blood pressure standards that put so much of the population into the chronic management category.
2003 One of many articles defining optimal BP as 115/75
http://www.ncbi.nlm.nih.gov/pubmed/12698067
2003 WHO guidlines for management of hypertension
http://www.ncbi.nlm.nih.gov/pubmed/14597836?dopt=Abstract
1999 WHO/ISH hypertension guidelines changed
http://www.who.int/bulletin/archives/77(3)293.pdf
Etc. I won't fill the thread will more references, but it does seem convenient that those kinds of studies supported years of massive profits.
Common sense says that losing weight, exercising, eating right, and the resultant decrease in BP is good for someones health and longevity. No one is questioning that (at least I don't think so). I am just questioning the method that we push medicine forward: Pharma funds research through directed grants, research concludes that millions are at risk for X (big surprise), Pharma produces a drug to manage X, Pharma posts big profit numbers.... rinse and repeat.
Last point:
Look at this POA thread. Here we have a guy that weights 146lbs., runs marathons, eats an almost perfect diet, and is concerned about a 131/75BP. Most of us wish/dream we were as healthy as this individual (I do), yet modern medicine has defined him as at risk and he is concerned about it. Perfect example of what I am talking about.
http://www.pilotsofamerica.com/forum/showthread.php?t=62587&highlight=blood+pressure