Related guidance:

DVLA:

Neurological disorders: Assessing fitness to drive

Psychiatric disorders: Assessing fitness to drive

Drug or alcohol misuse or dependence: Assessing fitness to drive

4.1 - Dementia
4.2 - Epilepsy and other seizure disorders
4.3 - Mental health disorders
4.4 - Movement disorders
4.5 - Nausea and labyrinth disorders
4.6 - Pain
4.7 - Sleep disorders
4.8 - Substance dependence