Key takeaways
NovoLog (insulin aspart) and Afrezza (insulin human inhaled) are both fast-acting insulins used to manage blood sugar levels in people with diabetes. NovoLog is injected under the skin or given as an infusion, while Afrezza is inhaled through the mouth. NovoLog can be used by both adults and children, whereas Afrezza is only approved for adults. Afrezza is a good option if you prefer not to use injections, but it cannot be used if you have breathing problems like asthma or chronic obstructive pulmonary disease (COPD). NovoLog starts working within 15 minutes and lasts for about 2 to 4 hours, while Afrezza starts working in about 12 minutes and lasts for 1.5 to 3 hours. Both medications can cause low blood sugar, but Afrezza also commonly causes cough and throat irritation. If you smoke or have recently quit, Afrezza is not recommended due to safety concerns.
