Final answer:
Cocaine is the only local anesthetic that also has vasoconstrictive properties; however, its medical use is restricted due to its potential for abuse.
Step-by-step explanation:
The only local anesthetic agent with vasoconstrictive properties is cocaine. Cocaine is a naturally occurring alkaloid found in the leaves of the coca plant and was the first local anesthetic to be discovered. When used in medical settings, cocaine not only numbs the area on which it is applied but also causes the blood vessels to constrict. This vasoconstriction can help to reduce bleeding and prolong the duration of the anesthetic effect. However, due to its potential for abuse and the development of synthetic alternatives with fewer side effects, the use of cocaine as an anesthetic is now highly restricted.