A dietitian (also spelled dietician) is a therapist who specialises in the role of food and nutrition in health. This may involve creating eating plans to help manage medical conditions, promoting good health through healthy eating and providing education on good nutritional habits.

Differential diagnosis is the process of finding the cause of symptoms by ruling out other possible causes. The diagnosis of multiple sclerosis is made by differential diagnosis.

Direct payments are paid by your local council to people who have been assessed as needing care. These can give you more flexibility over how your care and support is provided.

Vumerity (diroximel fumarate) is a disease modifying drug licenced for relapsing remitting multiple sclerosis (MS).  It is taken as two tablets, twice a day.

Covers what disability means to different people, legal definitions for disability, and what support is available if you’re living with MS.

Donepezil (Aricept) is a drug used in the treatment of Alzheimer's disease which has been studied as a treatment for impaired memory in people with multiple sclerosis (MS).

Double vision (diplopia) can occur in multiple sclerosis when the nerve pathways that control eye movements are damaged.

Once a new drug has completed clinical trials, it needs to pass through two stages before it is made available on the NHS. Read more in this A-Z entry.

The development of new drugs is a long and difficult process. Overall, it may take 10-15 years for a new compound to get from the test tube to the medicine cabinet. Find out about the different stages involved in making a new medicine.