Trazadone is a prescription drug that comes as an oral tablet an oral capsule.Trazadone oral tablet is available as a brand-name drug anaflex. Also available as a generic drug. Generic drugs usually cost less than the brand-name version. In some cases, they may not be available in all strengths or forms as the brand-name drug. This is a short-acting muscle relaxer. It works by blocking nerve impulses (pain sensations) that are sent to your brain. It is used to treat spasticity associated with diseases like multiple sclerosis and spinal cord injuries by temporarily relaxing muscle tone.