Is it possible to get insulin with no preservatives?  I am allergic to preservatives and I am taking Lantus at night and I have started getting symptoms of allergies, coughing and wheezing.  Have been on the Lantus for about 5 weeks.  I stopped injecting Lantus 48 hours ago and my symptoms have subsided.
Hi. It's not possible to get insulin without preservatives. Insulin is degraded and it becomes impure without them. Since you have found such a strong correlation between your symptoms and insulin use my advice would be for you to undergo desensitization under the care of a dermatologist. Prior to that please undergo a patch test. If you can be managed with other injectable preparations for diabetes you should consider that. Take care.  Chat Doctor.