Same for me. I had a doctor one time who thought I should stop the calcium channel blockers and just take the bata blockers. I was on both. But it turned out to be a mistake. I started getting dizzy and almost feinting. (Near syncopy) They put me back on the Ca channel blocker and I was back to normal in a day. I have since asked for both the medicines even though the cardiologist told me that they usually only go with one drug since they both slow the heart rate.
But I have been happy on the regimine of both pills. BTW, another thing that took a long time to discover was my low O2 at night. It turns out I have sleep apnea and when asleep I relax my lower jaw (mouth breather) This was a very serious find, as I am getting stronger each month since I have a ventilator too.
They don’t call it practicing medicine for nothing. They experiment and you’re the test subject. Most I’ve know are good people and do their best, but after all they’re just people. Always question and don’t follow their prescriptions blindly.