Official advice on the NHS website adds: "Amitriptyline is from a group of medicines called tricyclic antidepressants.

Chlordiazepoxide, amitriptyline HCl; 5mg/12.5mg, 10mg/25mg; tabs. Both components of chlordiazepoxide and amitriptyline HCl tablets exert their action in the central nervous system. Extensive studies ...

Amitriptyline is widely prescribed for chronic pain and depression, with figures showing more than 15 million UK prescriptions in a year ...

The prescription medication is commonly used to help manage nerve pain, depression and migraines ...