<<Disclaimer: Verify this information before applying it to your situation.>>
Several people pointed out that the web site www.glutenfreedrugs.com lists this as being gluten free. Others had called Abbott Labs too, and were also told that they spray this with a liquefied wheat gluten compound.
Nobody seems to know how to reach this web site to correct this, as it shows no webmaster nor contact information. It seems to be just run by "the drug industry", whoever that would be. As always, double-check for yourself to be sure.
Jere Cordell
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