A nurse is caring for a client who received a dose of cyclobenzaprine. Which assessment finding indicates the client is experiencing a common side effect of the drug?

A. The client has an elevated blood glucose level: Cyclobenzaprine does not interfere with insulin secretion or glucose metabolism. Alterations in blood glucose are not part of its adverse effect profile. Metabolic effects are not expected with this medication. B. The client is experiencing severe muscle pain: Cyclobenzaprine is a centrally acting skeletal muscle relaxant used to relieve muscle spasms and associated pain. Worsening or severe muscle pain would suggest inadequate therapeutic response or an alternative pathology. C. The client fell asleep while talking to the nurse: Cyclobenzaprine has significant central nervous system depressant effects due to its anticholinergic and sedative properties. Drowsiness and somnolence are among the most common side effects. This finding reflects the expected CNS sedation associated with the drug. D. The client has an increase in saliva production: Cyclobenzaprine has anticholinergic effects that reduce salivary secretion. Dry mouth is common rather than increased saliva. Excessive salivation is inconsistent with the medication’s pharmacologic action.