Glucose is a form of natural sugar that is normally produced by the liver. It is also a source of energy, not to mention that all the cells and organs in your body need glucose to function properly. Glucose, as a medication, is given either orally or by injection. Plus, it is used to treat very low blood sugar (hypoglycemia), most often in people with diabetes mellitus. In addition, it is given by injection to treat insulin shock (low blood sugar caused by using insulin and then not eating a meal or eating enough food afterward). Basically, this medicine works by quickly increasing the amount of glucose in your blood. Furthermore, Glucose is also used to provide carbohydrate calories to a person who cannot eat because of illness, trauma, or other medical conditions. Bear in mind that you should not take glucose tablets, liquid, or gel if you are allergic to any of the ingredients in these forms of the medicine. Plus, you need to tell your doctor before you receive a glucose injection if you are pregnant or breastfeeding, or if you have ever had diabetes, heart disease, asthma, kidney disease, or a possible head injury. Also remember to get emergency medical help if you have signs of an allergic reaction such as hives, difficulty breathing, or swelling of your face, lips, tongue, or throat.