Why are sleeping drugs given to ELDERLY in hospital? [NEED MED ADVICE- ReadDetails]?

My great grandmother is in her early 80's, she was admitted to hospital with a broken hip. She also has heart complications. I have now heard that she is being given sleeping tablets (an orange tablet if that helps). She has no problems sleeping at all in fact she can sleep for hours! She is slurring her words now and also she has not the strength to even lift a light cup. They are making her use a beaker, and won't take her to the bathroom, instead she has to use a commode. The took out her caffiter (unsure on spelling) and still have not allowed her to put on underwear. I personally see this as abuse of the elderly. I know my grandmother can be rather annoying at times but is it right to give elderly sleeping drugs in hospital? Is there are genuine medical reason for this or is it to make it easier for the nursing team?