NovoLog Mix 70/30 Drug Interactions: NovoLog Mix 70/30 insulin is prescribed to diabetics to control blood sugar; do not use if you are allergic to any of its ingredients. Like other insulin, many medications can interact with NovoLog Mix70/30 and alter how effective it will be, so let your prescribing physician know what you are taking. Monitoring blood sugar levels is an important part of a diabetic treatment program; many health insurance plans will cover the cost of a glucose monitor.