Ambien 5 mg is a prescription medication primarily used to treat insomnia, a common sleep disorder characterized by difficulty falling asleep, staying asleep, or achieving restful sleep. Ambien is the brand name for zolpidem tartrate, a sedative-hypnotic drug that acts on the brain to induce relaxation and promote natural sleep. The 5 mg strength is considered a lower dose and is often prescribed for certain populations, such as women, older adults, or individuals who may be more sensitive to sedative effects.