Hello, Thanks for writing to us. I have gone through your query ad understood the concern. In the current scenario, I would prefer going for increased dietary fiber. The dosage of the medication is probably not sufficient to initiate the bowel movement alone. Cramping feeling in rectal area could also be due fecal impaction and to relieve this, anal dilatation is useful. Dilators are available in several sizes and you can use one of them that suits you after informing your health care provider. Glycerin enema can be of some use if there is difficulty that persists. This should be kept as the last resort. Hope you find this information useful. Wish you good health.