Prospan has been subject to rigorous clinical testing. These trials have demonstrated the effectiveness of Prospan for chesty and bronchial coughs.

prospan_study_1_gulyas.pdf
prospan_study_3_laessig.pdf
prospan_study_4_jaegerbecker.pdf
prospan_study_5_gulyas.pdf
prospan_study_6_mansfeld.pdf
prospan_study_9_hecker.pdf
prospan_study_12_luer.pdf
prospan_study_15_germanpharmacynews.pdf
prospan_study_16_eumonograph.pdf
prospan_study_17_kraft.pdf
prospan_study_18_runkel.pdf
prospan_study_19_madidannik.pdf
prospan_study_20_bolbot.pdf
prospan_study_21_hegener.pdf

Use as directed. Always read the label. Consult your healthcare practitioner if symptoms persist.