A nurse is reinforcing teaching with a client who has schizophrenia and a new prescription for haloperidol. The nurse should instruct the client to avoid taking which of the following medications?

A. Diphenhydramine. Diphenhydramine is a first-generation antihistamine with anticholinergic properties that can increase the risk of central nervous system (CNS) depression when taken with haloperidol. Both drugs can cause sedation, confusion, and impaired coordination, increasing the risk of falls and other complications. Additionally, combining them can worsen extrapyramidal symptoms (EPS) or lead to anticholinergic toxicity, making it an unsafe combination. B. Docusate sodium. Docusate sodium is a stool softener used to prevent constipation. Haloperidol can cause constipation as a side effect due to its anticholinergic properties, so docusate sodium is safe and may even be beneficial in preventing bowel complications. C. Ibuprofen. Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) used for pain and inflammation. While it does not have a direct interaction with haloperidol, it should be used with caution in clients with a history of gastrointestinal issues or kidney disease. However, it does not pose a significant risk when taken alongside haloperidol. D. Glucosamine. Glucosamine is a dietary supplement used to support joint health. It does not interact with haloperidol and does not have sedative or CNS effects. Clients taking haloperidol can safely use glucosamine if needed.