Hello Dear
In my opinion itching is not due the medication. As your mother is a diabetic patient and is known as a Silent killer. It has effect on
Kidney. You must do her Renal function test and if B. urea is raised than itching is due to that and you need to treat that. Consult you
nephrologist for that.
Otherwise you can try
calamine lotion or aleovera for local application. Make a list of food or substance which cause or increases your itching and keep yourself away for that.
A
dermatologist specialist opinion can be taken if this is due to roughness of skin.
Best wishes