“4 Comparison of the C‐fibre responses to PBG and to a mixture of PBG and LVDP revealed that the period of apnoea was shortened and the discharge rate of the C‐fibre reduced when LVDP was present.”
“It is, thus, likely that the antitussive effect of LVDP is mediated through its inhibitory action on C‐fibres.”
“ LVDP reduced both the duration of apnoea and the response of the C‐fibre to PBG.”