I have heard to directly place cayenne pepper under the tongue in case of heart attack, not capsules. You would have to open the capsules.
On another vein, cayenne capsules do help some forms of arthritis to reverse. It cleared up my hands over a period of time. However if you a hiatial hernia, (malfunctioning lower stomach valve), capsules on an empty stomach can give you hellatious heart burn.
Long Cayenne Pepper slide -
A long departed and beloved cat of ours was diagnosed at age 2 with severe hypertrophic cardiomyopathy, and not expected to live longer than another year. After he insisted on spitting out his prescribed meds behind doors for me to find later, I figured him to be likely a lost cause, but began researching natural alternatives on the Internet. I bought extracts of hawthorn berry and motherwort and CoQ10, mixing them together in olive oil.
Here’s the kicker: I knew cayenne pepper was highly recommended, too, and had bought an extract of that, but would a cat take it? After placing some on my own tongue, I had extreme doubts... but added it to the mix, anyway. I put it in an amber bottle, shook it well, and poured a bit into a small spoon... And to my shock and delight, he came over and licked all of it right up! The taste notwithstanding, it’s like he instinctively knew it was what his body needed.
I gave him a spoonful a day of that mixture, and he was his happy self once again soon afterward. He lived twelve more years, not just one, and was happy and healthy. When he died, he simply keeled over one evening, after a full day - his heart probably gave out - and, while I was grief-stricken, I also thanked God for his exceptional life, and that his passing was more quickly than any of our creatures’, before or since - we should all be so fortunate. But his life got me on the track to alternative healing approaches, and for that, too I am grateful.