Prospan is a sugar free cough syrup.It belongs to the class of herbal medications used to treat sore throat, cough, and phlegm in adults and children over two years. Prospan contains Ivy leaf dry extract, a herbal medication. Ivy leaf dry extract acts as a mucolytic agent that works by thinning and loosening phlegm or mucus in the lungs, windpipe and nasal passage, thereby helping to cough out easily.

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