A blood substitute (also called artificial blood or blood surrogates) is a substance used to mimic and fulfill some functions of biological blood.It aims to provide an alternative to blood transfusion, which is transferring blood or blood-based products from one person into another. blood substitute (also called artificial blood or blood surrogates) is a substance used to mimic and fulfill some functions of biological blood.
Over-the-counter Nexium is FDA approved for treatment of frequent heartburn, which is heartburn that occurs two or more days a week. Prescription Nexium is designed to reduce the amount of acid in a personâs stomach, effectively treating GERD, acid reflux disease and symptoms of heartburn.
Nexium Dosage. Nexium 20 mg and Nexium 40 mg are the recommended daily dose for patients, depending on the severity of their respective problems. Nexium 10 mg is prescribed for children below 11 years of age. In general, the drug is given for up to 8 weeks.