“…A variety of anticholinergic drugs are used to manage sialorrhoea, such as hyoscine, scopolamine, glycopyrrolate/glycopyrronium, tropicamide, atropine sulphate and ipratropium bromide (Mato et al, ; Parr et al, ; Arbouw et al, ; Odachi et al, ; Lloret, Nano, Carrosella, Gamzu, & Merello, ; Zeller, Lee, Cavanaugh, & Davidson, ; Dias et al, ; Thomsen et al, ). All the studies which were reviewed confirmed the effectiveness of systemic anticholinergic drugs (Arbouw et al, ; Lloret et al, ; Mato et al, ; Odachi et al, ; Parr et al, ; Zeller et al, ).…”