You should be looking at his PURE water intake a day and it should be to Dr.Fereydoon Batmanghelidg's protcol. This will help dramatically with the Arthritis alone. Most old folk won't drink correct levels because they don't want to urinate all day. Water is second to Oxygen in Importancy to life, this should tell you alot from just that.
The heart pills are useless and if he had his liver cleansed this would change the blood pressure dramatically as its regulated from here. You can use many products to lower blood pressure.