 [ Symptoms ] what is the difference between novolog 7030 and novolin 7030 insulins> [ Disease ] this is a very important question so i am glad you asked before the new insulin pens came out there were four types of insulin  rapid acting short acting intermediate acting and long acting when it comes to the pre mixed insulins like novolog 7030 there are fewer differences between the brands for example novolog versus novolin whether contained in a bottle or in a pen the premixed insulins all contain a combination of both an intermediate acting insulin and a short acting insulin the numbers on the bottle or pen refer to the percentage of each type of insulin contained in the mixture that means both novolin 7030 and novolog 7030 contain a mixture that is 70 intermediate acting insulin with 30 short acting insulin however novolin 7030 takes slightly longer to begin working than novolog 7030 which has a rapid onset both novolin 7030 and novolog 7030 may last up to 24 hours in the system no matter what kind of insulin you have been prescribed it is crucial you understand how to use it correctly using any insulin incorrectly can cause serious side effects if you do not understand how to use your insulin please consult a pharmacist as soon as possible hope this helps