Can Stopping Amitriptyline Cause Insomnia?

Can Stopping Amitriptyline Cause Insomnia? Psychological symptoms, such as appetite loss, an increase in anxiety, irritability, fatigue, insomnia, problems with concentration, restlessness, issues with memory, hypersensitivity to environmental stimulation such as lights or sound, and crying spells (mood swings). How long do amitriptyline withdrawal symptoms last? Usually, amitriptyline withdrawal symptoms last one to three weeks.