Drinking sufficient liquids is generally advised to prevent constipation, as is physical activity. In cardiac patients amount of liquids may need to be adjusted if it causes increased blood pressure, swelling of legs, shortness of breath or other side effects or if patients are on water pills/diuretics - which you are not as per list provided. One of medications used frequently for treatment of constipation is Polyethylene glycol = PEG - available under multiple brand names eg: MIRALAX. This powder can be taken mixed with a glass of water or another liquid every few hours until it results in a good cleansing bowel movement - and then once daily - or dose may be adjusted as needed to produce a bowel movement daily. Other medications for constipation are available over the counter: Dulcolax tablets or suppositories - it is an effective laxative but may work somewhat abruptly and not recommended long term. A good stool softener is colace - it can be used long term, but it is not a laxative - in itself does not stimulate a bowel movement. Enemas are used when stool got blocked and resulted in so called fecal obstruction.