Final answer:
The nurse should recommend the client take headache medication as directed by the healthcare provider, considering the client's prescription for metoprolol, a β-blocker targeting the B1-receptor used in cardiovascular treatments.
Step-by-step explanation:
If a client who is newly prescribed metoprolol for the treatment of cardiovascular disease complains of a headache, the nurse should advise them to take the headache medication as prescribed by their healthcare provider. It's important to follow the provided instructions because interactions with other medications need to be considered. Metoprolol is a β-blocker that specifically targets the B1-receptor, managing blood pressure and heart rate, aiding those with cardiovascular concerns. When taking metoprolol, caution should be taken when using other medications to avoid adverse effects such as bradycardia or reduced efficacy of either drug.