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Does Lantus insulin raise or lower your blood sugar?

Medically reviewed by Melisa Puckey, BPharm. Last updated on June 12, 2023.

Official answer


Lantus lowers high blood sugar levels.

Lantus (insulin glargine) is the man made form of a long acting insulin that is given by injection to diabetic patients, to lower their high blood sugar levels.

  • Normally our bodies naturally produce the hormone insulin which works to keep the levels of sugar (glucose) in our blood to the ideal range.
  • People who have diabetes have high blood sugar levels regularly due to their body not producing enough insulin or their body has become resistant to the effect of insulin.
  • Lantus insulin carries the excess blood sugar from your bloodstream and stores it in your body’s tissues to use for energy later on.
  • Lantus lowers the high blood sugar levels that diabetic patients have so that the blood glucose levels are a more normal range.

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