Unfortunately using medications to help move things along for longer than a couple of days can make the body dependent on it. It might be that you need to talk to a health professional about a plan for weaning off the meds.

In the meantime, drinking lots of water is really important - does he drink water? Other than that, a good diet including plenty of fresh fruit and veg is the best thing. For times when things are a bit blocked up, sultanas, prunes and pear juice are good, but the aim is to have enough water, fruit and veg in the diet to not need this very often. Some other high fibre foods you could include in his diet are bran, baked beans, kidney beans, dry split peas and wholemeal pita.

GL!