My son has awful constipation. We thought at first it was just due to his terrible fussy eating. He was put on lactulose which didn't do much. But as his language is improving we realised he is actually holding it in cos he fears the pain of actually going. He also leaks for about 4 nappies before a poo. (These are scarily big)
Anyway we started movicol on friday pm and he hasn't pooed since. I gave the first lot with water but it took me ages cos he hated it. The second two doses I gave with milk but then I asked the chemist about it and they said not to. He hates any juices/squashes etc. So with the next 2 doses I mixed it with water so it dissolved then added some milk.
We even gave 2 doses yesterday and a glycerine suppository the dr prescribed.
Everything I read says movicol works fast! So 5 days is a bit of a worry.