bitter tonic

bit·ter ton·ic

a tonic of bitter taste (for example, quinine, gentian, quassia) acts chiefly by stimulating the appetite and improving digestion.
See also: bitters.
References in periodicals archive ?
Agrimony - a bitter tonic with a beneficial effect on kidneys.
He was quickly named surgeon-general at the military hospital in the town of Angostura, and in that capacity, he began to experiment with all available plants and herbs, eventually creating a bitter tonic that brought relief to the fevered and ailing soldiers in his care.
Dorian's words, penned in 1890, reflect the heady mix of nationalism and memory that was brewing in the years surrounding the Land War--a sometimes bitter tonic that often looked back to the Famine.
Dandelion root is another liver herb that encourages the flow of bile and Oregon grape root is a bitter tonic herb for the liver.