Key takeaways
Benzocaine topical and lidocaine viscous (Xylocaine) are both local anesthetics used to relieve pain, but they have important differences. Benzocaine topical, available over-the-counter, is used for temporary relief of pain and itching from minor skin irritations like burns, cuts, and insect bites. It comes in various forms such as creams, gels, and sprays. Lidocaine viscous, on the other hand, is prescription-only and is used to numb painful sores in the mouth and throat, as well as to prevent gagging during dental procedures. It is typically swished and spit or swallowed. Both medications can cause a rare but serious condition called methemoglobinemia. Common side effects of benzocaine include mild burning or stinging, whereas lidocaine can cause dizziness, drowsiness, and blurred vision. It's important to follow dosing instructions carefully for both medications to avoid serious side effects.
