Hi,
Welcome to HCM.
I understand your concern.
You are right in complaining the
dizziness as it is one of the recognised side effects of
Lisinopril.
As far as reducing the dosage from 20 to 10mg is concerned, I think youe BP is in pretty safe range to try reducing the dose.
In my view, you can reduce it to 10mg with lots of caution that is frequent monitoring of BP, say 5-6 time per day for the first week.
If there is a fluctuation, which is not acceptable, then you will have to come back to original dosage.
Regarding
metabolism, I don't think tha 109/66 is a
low BP by any means that suggests that it can influence your metabolism.
Last but not least, as you must be aware, that for treating
hypertensive disease, lifestyle modification is very important. So, you should practice that along with the medications.
Hope this resolves your query.