Final answer:
A stinging sensation is a common side effect of sublingual nitroglycerin and usually indicates that the medication is potent and effective. However, if discomfort worsens or other symptoms occur, it's important to seek medical advice.
Step-by-step explanation:
If nitroglycerin is administered sublingually (SL), and the client complains of a stinging sensation, this is generally considered a normal side effect. Nitroglycerin is a vasodilator used commonly to treat angina pectoris (chest pain) by improving blood flow and reducing the heart's workload. The stinging sensation is usually indicative of the drug's potency and that it is still effective. If there is no stinging sensation, it may suggest that the medication has lost its potency, for example, if it has been stored improperly. Nevertheless, if the discomfort worsens or is accompanied by other symptoms, it is important to contact a healthcare provider.