Does rogaine 2% have fewer sides than rogaine 5%

[lucrio]

Simply put, I used rogaine foam 5% and experienced sporadic rapid heartbeat after the first use and by the fourth use quit using it altogether as that side effect was jus too much. I still want to be able to use minoxidil so does anyone have experience of not seeing side effects using 2% as opposed to having sides on the 5%?