The study you have is a secondary source, not peer reviewed. It's in response to a connection of channel calcium blockers and breast cancer.

Here is the primary research. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC49327...

Drug companies don't want to go out of business.

There are a lot of classes of blood pressure meds, but not all are calcium channel blockers, which are the ones mentioned here. They typically are not the first line treatment, but I suppose if a doctor wants to put you on BP meds, you could ask for this class of drugs instead. Of course like everything, this targets just one area, so it won't work for everyone's cancer. Barbe, when you see your PCP, ask what kind BP drug you're on. You could have a discussion on whether switching to a calcium channel blocker would be appropriate.

It would. I wonder, however, if it has the potential to help slow further spread. There are, of course, no studies to back that up, so it would just be about the pros and cons of switching to a different class of drugs than you're currently on (not sure what you're on; perhaps one is a calcium channel blocker) for the small chance it could have a side benefit. Like everything, the drugs have side effects and can interact differently with other drugs.

I just filed it in my mind (and noted it on my notes on my phone) as something to remember if my docs ever want to put me on BP meds. I would not take one just for this potential effect, but if I have to choose one over the other, then that might sway my decision.

It's frustrating because it seems like the studies often show conflicting things........I suppose that's the nature of science, but it's frustrating when it directly impacts you.

Barbe, if you'll take a look at Nanpop's post above, the article she linked to discusses and explores the contradictory studies of the effect of hypertension drugs on breast cancer. The study presented is quite a large effort and, going by their results at least, should be reassuring.

Barbe, my reading of the NCBI link, above, is that it addresses the question of whether hypertension drugs add to risk of breast cancer and found, from their very large study, that the answer is NO.

I had read that diuretics, which are typically first course treatment when initially diagnosed with hypertension, can increase risk of BC. That was a few years ago.

You also need to remember than some BP meds increase risk of type 2 diabetes.
Beta blockers are prime examples. There is one newer beta blocker that does not increase diabetes risk (carvedelol/Coreg).

On this same back and forth, we had all been reading that NSAIDS decrease risk of BC recurrence and other cancers. Yesterday, I read that non-aggressive endometrial cancer has a worse prognosis for women who have taken NSAIDS for 10 or more years. And the really aggressive uterine cancer actually fares better. I hope they just wrote that article poorly.