Final answer:
The symptom commonly included in the signs and symptoms of benzodiazepine discontinuation syndrome is nightmares.
Step-by-step explanation:
The symptom commonly included in the signs and symptoms of benzodiazepine discontinuation syndrome is nightmares. Benzodiazepines are medications commonly prescribed for anxiety and insomnia. When these medications are abruptly stopped, withdrawal symptoms can occur, including nightmares.