Consult a health care practitioner if symptoms worsen or if laxative effect does not occur within seven days. Consult a health care practitioner immediately if you experience chest pain, vomiting, or difficulty in swallowing or breathing after taking this product. Consult a health care practitioner prior to use if you are taking medications which inhibit peristaltic movement (e.g. opioids, loperamide) and/or if you have symptoms such as abdominal pain, nausea, vomiting or fever (as these could be signs of abnormal constrictions of the gastrointestinal tract, diseases of the oesophagus and/or the superior opening of the stomach (cardia), potential or existing intestinal blockage, paralysis of the intestine, megacolon, fecal impaction, inflamed bowel or appendicitis). Do not use if you are experiencing a sudden change in bowel habits that has persisted for more than 2 weeks, undiagnosed rectal bleeding, failure to defecate following the use of another laxative product, if you have diabetes mellitus in which blood sugar is difficult to regulate and/or difficulty swallowing. Hypersensitivity, such as allergy, has been known to occur following inhaled and/or ingested psyllium; in which case, discontinue use. May cause temporary gas and/or bloating.