Subutex is used to treat opioid addiction. You can buy Subutex online as well as offline. But as it  comes  under scheduled III medicine, some restrictions are imposed on selling it without permission. However you can order Subutex  online from authorized pharmacies with a valid prescription. The main component of subutex is Buprenorphine which helps to reduce opioid addiction. You can purchase subutex online overnight to cope with any emergency situation. You just have to place the pills under your tongue, not to chew or swallow. It will immediately respond to your body. It also has several side effects like chest pain, blurred vision, muscle pain, itching etc.