Lanqin Oral Liquid,

clears away heat and detoxifies, relieves sore throat and reduces swelling. It is used for acute pharyngitis, sore throat, dry throat, and pharyngeal burning caused by lung and stomach excess heat syndrome.

Compound Houttuynia cordata granules,

clear heat and detoxify. It is used for throat pain caused by exogenous wind-heat; acute pharyngitis and tonsillitis.

It’s almost the same, you can take it if you have a fever or a sore throat.