|R/Neutral/NPH/Isophane Mix by Eli Lilly|
|Also known as||Huminsulin Profil II, Humulin 20/80, Humulin M, Humulin M2, Humulina 20/80, Humuline 20/80, Profil 20, Profil II, Umuline Profil 20|
|Action in dogs||
|Use and Handling|
|Shelf Life||30 months|
|When opened||6 weeks room temp.|
|In pen||6 weeks room temp.|
Its UK counterpart, Humulin M2, was discontinued in the EU & UK in July 2004.  Lilly also discontinued its North American version of this insulin, Humulin 20/80. The insulin is also known as Umuline Profil 20, Huminsulin Profil II and Humulina 20/80.
Mixed insulins cover a wide range as they can be animal origin, r-DNA/GE/GM origin or analog insulins. The non-analog mixed insulins are made up of intermediate-acting NPH/isophane insulin and short-acting R/neutral. normal insulin. The analog mixes are made from intermediate-acting protamine-suspended analog insulin (suspended similar to NPH/isophane insulin) and fast-acting analog insulin. They can also vary in the fraction (amount or percent) of the two types (R/neutral and NPH/isophane) of insulin used to make a non-analog mix, and in the percentage of fast/rapid-acting analog insulin and slower-acting protamine suspended analog insulin.
For some reason, those in the US choose to list the slower, NPH/isophane based insulin fraction first, such as Humulin or Novolin 70/30. The rest of the world gives the faster insulin top billing and the result is 30/70. Regardless of how this is written, it means that the insulin is made up of 70% NPH/isophane insulin and 30% R/neutral insulin.
The most common mixes are 70/30 (30/70) (non analog) or 75/25 (25/75) (analog). There are no currently-marketed mixes which combine insulins of different origins. Eli Lilly's form of beef/pork Iletin and Novo Nordisk's Lentard were discontinued some time ago. Here are the most common ones that could cause confusion:
|Non-Analog Mixed Insulins|
|Insulin Is||Expressed As||Expressed As|
|10% R/Neutral Insulin|
90% NPH/Isophane Insulin
|20% R/Neutral Insulin|
80% NPH/Isophane Insulin
|30% R/Neutral Insulin|
80% NPH/Isophane Insulin
|40% R/Neutral Insulin|
60% NPH/Isophane Insulin
|50% R/Neutral Insulin|
50% NPH/Isophane Insulin
- ↑ 1.0 1.1 Penmix 20. Medsafe NZ.
- ↑ Maddison, Jill E.,Page, Stephen W.,Church, David B. (2008). Small Animal Clinical Pharmacology. Saunders Ltd..
- ↑ Humulin 20/80. Rxmed.com.
- ↑ Scientific Discussion Actraphane. EMEA.
- ↑ Withdrawal of Humulin M2. Pharma Journal (July 2004).
- ↑ Lilly EU/UK Product Sheet & Time Activity Profiles. Eli Lilly.
- ↑ Insulins & Mixtures. NHS.
- ↑ Scientific Discussion-Mixtard. EMEA.
- ↑ Prescribing Novo Insulins.