First of all consult a good doctor preferably Cardiologist. To speed up diagnosis , take general health package test from NABL accredited Lab including LFT, Lipid Profile, Thyroid Profile, Blood Sugar etc . Cardiologist may add other test for further diagnosis: ECG , ECHO, Treadmill stress test etc.
As a certified Nutrition Coach, I recommend a sustainable fat loss if she is overweight. Low intensity physical activity is recommended. Also balance her diet for proper Sodium-Potassium ratio as well adequate macro and micro nutrients. Healthy Lifestyle along with proper medication does all of the good work , there is no shortcut.
homeopathy is not even a medicine.
Alopathic meds as per prescription of an MBBS doc. Please don't be confused.
Cardiologist should be your call, facing issue on left side shouldn't be ignored as this is an outcome of nerve damage. Are you sure it's dizziness or infact vertigo on the left side when she is sleeping?
It's your MOM dude, my recommendation is stop asking for help from an online forum where half of us doesn't even know what to advice and other can advice which could be wrong for your mom. Please consult a doctor specially cardiologist MD/MBBS and forget about homeopathy. BP/Diabetes are silent killers and most of us ignore as they doesn't show any symptoms initially.