Final answer:
A nurse should expect headaches as an adverse effect of sublingual nitroglycerin in clients with angina, due to the vasodilation action of the drug.
Step-by-step explanation:
A nurse collecting data from a client who has angina and a new prescription for sublingual nitroglycerin should expect certain adverse effects as a result of this medication. Sublingual nitroglycerin is used to treat angina because it acts as a vasodilator, improving blood flow to the heart muscle by dilating the coronary arteries. While it helps alleviate the symptoms of angina, it can also cause several side effects. One common adverse effect of sublingual nitroglycerin is a headache due to the vasodilation action of the drug. Other side effects can include dizziness and a drop in blood pressure, but headaches are most frequently reported by patients.