Take this product by mouth as directed by your doctor or the package. Take this product 1 hour before or 2 hours after meals. It may be taken with food if it upsets your stomach. Avoid milk, bran, grains, or cereals within 2 hours of taking this product. Use this product regularly in order to get the most benefit from it. To help you remember, use it at the same time(s) each day. Nausea, stomach upset, and heartburn may occur. Tell your doctor or pharmacist promptly if any of these effects last or get worse. If your doctor has directed you to use this product, remember that your doctor has judged that the benefit outweigh the risk of side effects. Many people using this product do not have serious side effects. Tell your doctor immediately if you have any serious side effects, including signs of infection (such as sore throat that does not go away, fever, chills), sores in the mouth, unusual tiredness, and weakness. A very serious allergic reaction to this product is rare. However, get medical help immediately if you notice any symptoms of a serious allergic reaction, including rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, and trouble breathing. This is not a complete list of possible side effects. Contact your doctor or pharmacist if you notice other effects not listed above. In the U.S. – Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. In Canada – Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345. If you are looking for high quality, high purity, and cost-effective zinc sulfide, or if you require the latest price of zinc sulfide, please feel free to email contact mis-asia.