If you want to buy without prescription then, First you take advice from a doctor then you buy Ambien 5 mg online.There are four doses of Ambien available in the market. Ambien 5 mg is one of them. It is a sleeping pill that prevents Insomnia. It is not approved for anyone younger than 18 years old. It helps to fall asleep when you go to bed. Always take doctor's medication and then use it.