As Waverider stated, this reaction should be reported to the U.S. FDA.
On balance, Lantus is an effective long-acting means to control glucose levels with few people having any side effects.
Thanks for sharing your not so pleasant experience with Lantus. All medicines may cause side effects, but many people have no, or minor, side effects. These are the most COMMON side effects of Lantus.
Redness, swelling, itching, or mild pain at the injection site.
Seek medical attention right away if any of these SEVERE side effects occur when using Lantus Cartridge Systems:
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); changes in vision; chills; confusion; dizziness; drowsiness; fainting; fast heartbeat; fast, shallow breathing; headache; hoarseness; increased hunger, thirst, or urination; loss of consciousness; nervousness; seizures; slurred speech; stomach pain; sweating; sweet or fruity breath odor; swelling of the arms or legs; tremor; weakness.
This is not a complete list of all side effects that may occur.
You should report your altered smell side effects to the FDA at http://www.fda.gov/medwatch/ or 1-800-FDA-1088 (1-800-332-1088).