It is legal to buy Ambien (zolpidem) online in the United States, but only under certain conditions. Because Ambien is a Schedule IV controlled substance, federal law requires that you have a valid prescription from a licensed healthcare provider to obtain it. While in-person evaluations are typically required, current telehealth regulations allow some flexibility, enabling licensed providers to prescribe Ambien through virtual consultations in many cases. To stay within the law and ensure safety, you must purchase the medication from a legitimate, licensed online pharmacy that verifies prescriptions.