Ambien (zolpidem) is a prescription sleep aid used to treat insomnia. After ingestion, it’s rapidly absorbed, with effects lasting 6–8 hours. The average half-life is about 2.5 hours, meaning it leaves the bloodstream relatively quickly. However, traces can remain detectable longer—up to 24–48 hours in urine, 6–20 hours in blood, and several weeks in hair. Factors like age, metabolism, dosage, and liver function affect how long Ambien stays in your system. Misuse or combining Ambien with other substances can increase side effects and prolong elimination. Always use Ambien as prescribed to ensure safety and prevent dependency.