Prunella vulgaris's sexual taste returns to the meridian: cold; Bitter and bitter; Enter the liver and gallbladder meridian. Use with caution for people with weak spleen and stomach. Prunella vulgaris avoids iron.

Prunella vulgaris is cool, and some restaurants often use Prunella vulgaris pot herbal tea for customers to drink. People with heavy "moisture", weak spleen and stomach or rheumatism are likely to cause diarrhea and even aggravate their illness. Taking Prunella vulgaris in large quantities for a long time may have side effects and increase the load on liver and kidney. Long-term use of Prunella vulgaris will cause accumulation poisoning of traditional Chinese medicine components, which will seriously cause diseases such as liver and kidney. This is why some people feel kidney pain after taking too much.