Welcome to HCM.
You have mentioned nothing about your past history, however I will try to help you.
Since you have been taking inderal
sice a long time, dizziness
, low BP, etc can be due to inderal side effects or toxicity developing in your system.
It is a good idea to visit your clinician, get re-checked and get some other substitute medicine for inderal. Till than take care of your health, eat home made food rich in vitamin, mineral and antioxidants. Keep yourself well hydrated. Take care.