There is information that suggests kudzu contains ingredients that counteract alcohol.
It might also have effects like estrogen. Chemicals in kudzu might also increase blood circulation in the heart and brain.

kudzu is used to treat alcoholism and to reduce symptoms of alcohol hangover, including headache, upset stomach, dizziness, and vomiting. 
Kudzu is also used for heart and circulatory problems, including high blood pressure, irregular heartbeat, and chest pain; for upper respiratory problems including sinus infections, the common cold, hay fever, flu, and swine flu; and for skin problems, including allergic skin rash, itchiness, and psoriasis.

How to make a Hot Tea
Start with fresh, cold water. (The better the water quality, the better the tea will taste.) Place a tea bag in your favorite cup or mug. Bring water to a rolling boil and immediately pour over your tea bag. Steep for a good 3 to 5 minutes. (Great taste can't be rushed—it really does take the full time to release the tea's entire flavor.) Remove the tea bag, relax and enjoy! (Serve it “clear” or try it with milk and sugar.)

Here's a coldwater method for clear, cloudless iced tea
Fill a quart pitcher or container with cold tap water. Cover. Let stand at room temperature or in the refrigerator. Add 4 to 6 tea bags or 1 Family Size tea bag (remove tags). After at least 6 hours (or overnight), remove tea bags, squeezing against side of container. When ready to serve, pour into ice-filled glasses. Makes 1 quart. Recipe may be doubled.

DISCLAIMER
Some individuals may have adverse reactions to certain plants, herbs, and other natural products.
On any issue where no specific advice is given to consumers please follow this general advice; if you are currently taking the product;
you are advised to discontinue use and consult your pharmacist or herbal medical doctor.
When speaking to your doctor or pharmacist you may find it is helpful to take a copy of this MHRA advice about the product with you.
You should continue to take any medication prescribed by your doctor.

Frequently Asked Questions

Q: How much water should I boil with how much tea/herb?

Q: How do you calculate how much time you should boil water with tea/herb?

Q: Do you sell other tea/herbs not listed on the site?

Q: Can you mix household tea/herbs with leafnflower's tea/herbs?