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The team does not and cannot offer clinical advice. If you have any urgent medical enquiries we urge you to contact your GP, or NHS Direct at www.nhsdirect.nhs.uk or by calling 0845 4647. In an emergency call 999

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Fast-acting insulin starts to work in minutes and brings the glucose down in 2 to 4 hours. Modern analogue insulins can be given immediately before or straight after food. Fast-acting insulins can also be used to bring down a high glucose level – take care not to cause hypoglycaemia. Longer acting insulins are used for background action or to work later in the day. Their effects may last for days. Some of these insulins can be given without food because they work so slowly e.g. Lantus®, Levemir® .