Soluble insulins are the only ones that can be used intravenously. This is fast-acting Humulin S sold in the UK; the "S" in its name stands for "soluble".

Soluble insulins can be injected or used intravenously; the suspended insulins or mixes (cloudy insulins) cannot be used intravenously.[1] These short-acting and fast-acting insulin have nothing added to them to delay their onset, as is the case with suspended insulins.

Soluble insulins are mostly in the fast-acting or short-acting classes, and are used alone (not as part of a mix) as bolus insulin to cover meals or as Corrective insulin for blood glucose "corrections" when one's blood glucose level is too high.

Special note Analogs:


  1. Maddison, Jill E.,Page, Stephen W.,Church, David B. (2008). Small Animal Clinical Pharmacology. Saunders Ltd..
  2. Levemir-Page 8-Intravenous Administration Could Cause Acute Hypoglycemia. US-Food and Drug Administration.

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