An Opium 30 may well work BUT she is on a homeopathic remedy and therefore yu should not give her anything without getting in touch with the practitioner. Linseed gives me diarrhoea so may well work. Can you get Fibregel granules which is I.... husks (sorry can't remember the I... word)

Please don't force her to go. Wait until she has an urge. It will not harm her to wait another day. I wouldn't like her to get to stage where she is holding on to the stool because she is frightened to pass it as it will hurt. I had a 3 year old patient with this problem.