Side effects, toxicity, and interactions 

Licorice can cause serious side effects if you take too much of it or use it for too long. It has an effect similar to aldosterone. Aldosterone is a hormone that causes your body to retain salt (sodium) and lose potassium.

Taking too much licorice can cause high blood pressure. This can be severe. It can cause the following symptoms:

• Swelling because your body is retaining water (edema)

• Headache

• Lack of energy (lethargy)

• Heart failure or cardiac arrest