Final answer:
Aspirin can be taken with nicotinic acid (niacin) to reduce the side effect of flushing, which is a common side effect of niacin.
Step-by-step explanation:
The nurse should instruct the patient to take one aspirin tablet with nicotinic acid (niacin) to reduce the side effect of "flushing." Niacin is known to cause flushing as a common side effect and taking aspirin before niacin can help minimize this. It's important to note that while aspirin can help with this particular side effect patients should always follow their healthcare provider's recommendations on medication usage.