Choking: Taking this product without adequate fluid may cause it to swell and block your throat or esophagus and may cause choking. Do not take this product if you have difficulty in swallowing. If you experience chest pain, vomiting, or difficulty in swallowing or breathing after taking this product, seek immediate medical attention. Allergy Alert: This product may cause allergic reaction in people sensitive to inhaled or ingested psyllium. Ask a Doctor Before Use if You Have: a sudden change in bowel habits persisting for 2 weeks; abdominal pain, nausea or vomiting. Stop Use and Ask a Doctor if : constipation lasts more than 7 days; rectal bleeding occurs; these may be signs of a serious condition. Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center right away. Laxatives, including bulk fibers, may affect how well other medicines work. If you are taking a prescription medicine by mouth, take this product at least 2 hours before or 2 hours after the prescribed medicine. As your body adjusts to increased fiber intake, you may experience changes in bowel habits or minor bloating. New Users: Start with 1 dose per day; gradually increase to 3 doses per day as necessary.