It is also used to treat certain types of nerve pain, including neuropathic pain, fibromyalgia, and generalized anxiety disorder. It works by reducing the release of certain neurotransmitters in the brain, which helps to reduce pain and anxiety.In some cases, these two medications may be prescribed together to treat certain conditions. For example, some people with nerve pain may have a Vitamin B12 deficiency, which can exacerbate their symptoms. In this case, Methylcobalamin may be prescribed along with Pregabalin to address both the underlying deficiency and the pain symptoms.It is important to note that the use of any medication should be discussed with a healthcare provider, who can provide individualized advice based on a person's medical history, current medications, and other factors.