Fig. 1From: Modulation of transient receptor potential (TRP) channels by plant derived substances used in over-the-counter cough and cold remediesa Structural representation of the potential TRP channels involved in cough and airway hypersensitivity. Example chemicals which stimulate each TRP channel are shown above and the mechanical and physical stimuli below. b Flow diagram representing the steps involved in the cough reflex pathway in relation to the activation of TRP channels via relevant stimulantsBack to article page