Is it legal to buy Ambien online? In short ‘Yes’, it is completely legal to buy Ambien online if you have a prescription with you. You just need to find a pharmacy that is trusted and have a licence to sell prescription medicine. This medicine is controlled by the government. Because many people use this drug for recreational purposes because of the calm and relaxing effects it provides. Make sure to buy Ambien online from a reputed pharmacy. Because there is a lot of black marketing of the drug. Make sure that you are safe before providing your personal details to any website.