The invention provides a solution in water comprising the following components at the following concentrations: (a)N x (70 to 130) g/L polyethylene glycol (PEG) having an average molecular weight of 2500 to 4500； (b)N x (1.6 to 4.0) g/L sodium chloride； (c)N x (0.2 to 0.6) g/L potassium chloride； (d)N x (0.6 to 2.2) g/L sodium bicarbonate； (e)N x an amount of preservative； (f)optionally N x an amount of flavouring； and (g)optionally N x an amount of sweetener where N is in the range of 2 to 8.The solution is a concentrate for dilution. In use it is diluted N-fold with water to provide a solution for administration to a subject for the treatment of constipation or faecal impaction.Also provided are solutions, kits, unit doses and methods that comprise or use the solutions.本發明提供水溶液，其包含以下濃度之以下組分：(a)具有平均分子量為2500至4500的N×(70至130)g/L之聚乙二醇(PEG)；(b)N×(1.6至4.0)g/L氯化鈉；(c)N×(0.2至0.6)g/L氯化鉀；(d)N×(0.6至2.2)g/L重碳酸鈉；(e)N×一定量之防腐劑；(f)視情況選用之N×一定量之調味劑；及(g)視情況選用之N×一定量之甜味劑；其中N在2至8之範圍內。該溶液為供稀釋之濃縮物。在使用時，用水將該濃縮物稀釋N倍以提供用於投予個體以治療便秘或糞便阻塞之溶液。亦提供包含該等溶液或使用該等溶液之溶液、套組、單位劑量及方法。
