I'll suggest you gradually stop taking betnesol
by tapering i.e reduce daily dosage until you finally stop. This is because the benefits of the drugs are under weighing the risk. High BP
and high sugar levels increases possibilities of complications such as stroke
and other vascular and nervous complications.
Your mom could be placed on other drugs such as primalan or chlophiramine or areus or avil
etc. You can see your doctor and present the problems to him so he can find alternative medication for mom instead of a corticosteroid.