Brief Answer: Herbal medication Detailed Answer: Hi, Thanks for your query. Both Declinol and Last call contain Kudzu a plant incredient. It is of japanese origin and seen in moth east Asia. The flower of the plant contains a type of isoflavonoids which have antioxidant properties. Hence, it is used in people with alcoholism to detoxify the liver. It is also believed to get rid for the hangover and also cut down the habit but the success is meager. It is often recommended as an alternative to allopathic medication which usually have side effects. The success of this herbal medications is not scaled well. regards,

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