effervescent salt

ef·fer·ves·cent salt

Any of the preparations made by adding sodium bicarbonate and tartaric and citric acids to a medicinally active salt.
References in periodicals archive ?
-- an effervescent salt gargle for soothing sore throats, produced by Scottsdale, Ariz.-based O'Connor Companies -- is another example of a new cough treatment that is different from what has traditionally been on the market.
"Some people find effervescent salts, such as liver salts, help," says Angela Chalmers, Boots pharmacist.
Peppermint Foot Soak (pounds 7) is a revitalising treat, containing effervescent salts to cool cleanse and refresh.