Buy Valium 10mg Online is short term basis to help if feelings of anxiety are stopping you from falling asleep. It is also used to alleviate muscle spasms before surgical operations and to provide sedation. If you doctor wants to treat muscle spasms with diazepam, the dose can range from 2mg to 15mg. Your doctor will tell you how to divide this dose across each day. Higher doses of 20mg daily are sometimes prescribed to treat severe muscle spasms.