Final answer:
Nitroglycerin is a vasodilator that can be used to manage severe hypertension caused by PCP overdose.
Step-by-step explanation:
Overdose of phencyclidine (PCP) can result in severe hypertension. The condition can be managed with a vasodilator that helps dilate the blood vessels. One example of such a vasodilator is nitroglycerin. Nitroglycerin works by relaxing the smooth muscles in the blood vessels, allowing them to widen and improve blood flow. By reducing blood vessel constriction and promoting vasodilation, nitroglycerin helps lower blood pressure and manage hypertension caused by PCP overdose.