A patient with schizophrenia has been taking haloperidol for several months. He now has repetitive tongue movements and lip smacking. What is the likely diagnosis?

A patient receiving amitriptyline for chronic neuropathy is found to have a heart rate of 112 bpm, dry mouth, and urinary retention. What pharmacologic effect explains these findings?

A 76-year-old woman is prescribed a benzodiazepine for insomnia. What safety concern is most important for this age group?

A 34-year-old male on methadone for opioid use disorder is prescribed fluconazole for a fungal infection. What is the main pharmacologic concern?

An older adult with a history of Parkinson’s disease is prescribed carbidopa/levodopa. The nurse practitioner explains that carbidopa is added to:

A 28-year-old patient is prescribed lisinopril. After 5 days of therapy, the patient develops a persistent dry cough. What is the most appropriate action?

A patient is prescribed lithium for bipolar disorder. What lab monitoring is most critical during initial treatment?

A 55-year-old woman with chronic atrial fibrillation is started on dabigatran. Which patient instruction is essential to prevent serious harm?

A 59-year-old man with atrial fibrillation is prescribed amiodarone. Which baseline test is most essential before initiating therapy?

A patient is prescribed metoprolol for hypertension. During the follow-up, the patient reports fatigue and a low resting heart rate. What pharmacodynamic property of metoprolol explains these findings?