My mom has stable angina pectoris and since she was diagnosed her cardiologist had her on several medications, including propranolol, atenolol and now he talked with us about switching her atenolol to Nicorandil.
As far as mom’s experience goes, she was almost angina pain free while she was on atenolol and she is not too willing to try Nicorandil, and to be honest, I’m wondering are there any benefits to Nicorandil when compared to atenolol?
it's somewhat strange why would your mom's cardiologist want her off atenolol if she has been symptom free while taking it. It's even weirder that he wants to switch atenolol for nicorandil, when most cardiologist actually prescribe combination of nicorandil and atenolol for angina pectoris patients.
If your mom is symptom free with atenolol, if you can, get a second opinion before making any major changes.
your mom's case is similar to what my dad has been through. His cardiologist too switched him from atenolol to Nicorandil, but he at least explained to us why he was doing this - dad's cardiac function tests results weren't as good as when he first started atenolol and he switched him to Nicorandil to prevent his angina pectoris from worsening in the future.
Since atenolol wasn't as effective, he simply thought there was no point adding it to Nicorandil, but instead he scheduled dad's checkup for earlier than previously, just to make sure Nicorandil is working as it's supposed to. He didn't want dad to take any more medications than he needed to, because there is bigger chance for him to have more side effects, the more medications he took, which makes sense.