Actrapid (Act-rapid) is a medicine which is used in diabetes mellitus. Actrapid contains insulin soluble human. It is supplied by Novo Nordisk Limited.The information in this Medicine Guide for Actrapid varies according to the condition being treated and the particular preparation used.Your medicineActrapid is used as a substitute for the body’s insulin in people with diabetes. Insulin is a hormone produced in the body. It helps the body to use the sugar in the blood properly and it helps to prevent the blood sugar level from becoming too high.In diabetes, there is a problem with insulin. The body may not be able to produce enough insulin or the insulin that it produces may not have the full effect. In some instances, the body may not be able to produce any insulin at all.It is very important that your blood sugar level is well controlled. Blood sugar levels which are too high or too low can be dangerous. Very high blood sugar levels may lead to ketoacidosis; very low blood sugar levels may lead to coma– all of these may be life-threatening. Your prescriber or a member of your diabetes team will be able to give you information on how to recognise the warning signs of high and low blood sugar levels. They will also be able to tell you what to do if either of these occurs.Warning signs can vary from person to person. If the usual warning signs of poorly controlled blood sugar levels change or disappear, you should contact your prescriber or a member of your diabetes team.The amount of Actrapid you need to control your blood sugar levels will be worked out by your prescriber or your diabetes team. You may be advised to measure your blood sugar regularly and vary the amount of Actrapid that you use depending on the result of the measurement. Your prescriber or a member of your diabetes team will show you how to measure your blood sugar. If you are having problems controlling or measuring your blood sugar, you should contact your prescriber or a member of your diabetes team.At times the amount of Actrapid you need to use may change depending on your circumstances. These could include changes to your diet; irregular meal times, changes to your health during periods of illness or emotional stress; changes to the amount of physical activity that you are doing; or if you change to a different insulin. For more information about how to vary your dose when your circumstances change, make sure you have spoken to your prescriber or a member of your diabetes team.Other information about Actrapid:when changing to Actrapid from another insulin product, your prescriber will gradually reduce the dose of the other medicinesActrapid needs to be injected. Your prescriber will show you how to inject this medicine yourself.There should also be instructions on how to inject this medicine in the Patient Information Leaflet that comes with this medicine or on the pharmacy label.The pharmacy label on your medicine tells you how much medicine you should have. It also tells you how often you should have your medicine. This is the dose that you and your prescriber have agreed you should have. You should not change the dose of your medicine unless you are told to do so by your prescriber.Do not share your medicine with other people. It may not be suitable for them and may harm them.