According to a Mayo Clinic study published in November of 2012 in the journal, Hospital Medicine, the use of sleeping pills such as Ambien (zolpidem) quadruple the risk of falls. These drugs, which stimulate GABA brain receptors, have side effects such as dizziness, ataxia, hallucinations, and even sleep walking, may be much of the reason why. Falls can lead to fractures, blood clots in the lungs, and head trauma.
There are many other much safer and more effective sleep enhancement approaches such as music, meditation, hypnotherapy, guided imagery, autosuggestion, and even brain wave balancing that could be considered that don't have significant and potentiallyl dangerous side effects.
Of course, the underlying reasons for insomnia should be addressed too. Factors such as pain, sleep apnea, anxiety, depression, PTSD, and many others should be addressed whenever possible.