The doctors and hospital employees have a duty to assess a patient's fall risk, including risks that are caused by medications and their side effects. If your father was at a high risk for falls, and was not appropriately monitored, he may have a claim for the injuries that he suffered in the fall. You should contact an attorney in Indiana that specializes in medical malpractice work. He or she will need to gather the medical records and have them reviewed by a nurse and/or a physician who is familiar with the treatment of patients under this or a similar circumstance. The claim needs to be filed within two years of the date of the alleged act of malpractice in Indiana or it will be barred by the statute of limitations. Good luck.