A 35-year-old woman who has been taking paroxetine 40 mg daily for 3 years for generalized anxiety disorder reports that she ran out of medication 4 days ago and has been experiencing dizziness, electric shock-like sensations in her arms, irritability, vivid dreams, and flu-like symptoms. She denies any suicidal ideation or worsening anxiety beyond her baseline. She is concerned she may be developing a new medical condition. Which of the following best describes the clinical presentation?