Hello, Thanks for the query.
Your's first query, both of drugs you mentioned above don't have any side effects and secondly , if they are suited to you please take for long time without any hesitation.
As far as worry about K+leaching through urine , forget about this and don't think that hypertension
is due to this .
Diabetic patient that too 63 yrs is very prone to hypertension if he have diabetes
and you are a known case of diabetes.
One thing is very nice in your's case that you are a regular swimmer that too 45 minutes, quite amazing .
Good luck for speedy recovery. Dr. HET.