Dobutamine stress echo. Is also normal?

My mother is a breast cancer patient alongwith other prblms like BP thyroid diabetes and she is taking Aspirin n Atorvastatin since Dec 2019, Her 5 chemo are done n up for surgery, they need cardiologist clearance, she undergone for TMT but couldn't complete it due to low physical fitness, so oncologist suggested to have dobutamine test done, She is taking Metformin 500mg BD, , vildagliptin 50mg BD and glimiperide 2mg BD for sugar and telma 40mg BD and amlodipine 5mg OD for BP Just wanted to know can she take BP medicine in mrng before going for test, because in test her heart beat will rise so will be needing BP tablets after test , and if she takes it in the mrng then it will be double dose, and if she doesn't take then her BP rise due to miss of BP tablet, she takes her tablet at 6am approx and test will be done at 10am.. Plzz suggest what needs to be done. Test will be done tmrw mrng. Her ECG shows some changes but Dr said dats normal and echo is also normal