<human>: 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.
<bot>: 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. 