Antitussive Efficacy and Safety Profile of Ethyl Acetate Fraction of Terminalia chebula
Figure 1
Apparatus used in sulphur dioxide gas induced cough model. A: three-necked round bottom flask, containing 39% NaHSO3 solution, B: dropping funnel having concentrated H2SO4, C: gas reservoir, D: water manometer, and E: desiccator. The procedure used to produce sulphur dioxide gas is described in text.
