<<Disclaimer: Verify this information before applying it to your situation.>> Thanks to those on the list who helped me out on this including a Clinical Pharmacist. I did call Glaxo Wellcome for verification and all forms of Wellbutrin (75,100 and 150mg/regular and sustained release) are gluten and dairy free (no lactose, casein or whey). The rep at Glaxo Wellcome did say to check back from time to time as the supplier of an ingredient can change but for now the meds are GF & DF! Thanks again Jean No. Cal.