Cough-relieving and sore-throat-relieving drink and preparation method thereof

According to the cough-relieving and sore-throat-relieving drink and the preparation method thereof, radix stemonae is sweet, bitter and slightly warm and can moisten the lung and treat lung heat, cough and choking, aster glycoside, aster element and shionone contained in radix asteris can achieve the remarkable cough-relieving effect and can increase respiratory gland secretion, stemonine can reduce excitability of the respiratory center so that cough reflex can be inhibited, and the cough-relieving and sore-throat-relieving drink can be used for relieving cough and relieving sore-throat. The platycodon grandiflorum can dredge lung qi, purge fire and dispel cold, and treat phlegm accumulation, dyspnea, nasal obstruction and pharyngalgia, and the cicada slough can dispel wind and heat, relieve sore-throat and relieve voice; the radix saposhnikoviae has the effects of dispelling wind and relieving exterior syndrome, the cicada slough has an inhibition effect on non-specific immunity, the semen armeniacae amara