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Hi Stefanie,   Thank you for your question.   This was taken from the Boniva website: "BONIVA active ingredients: ibandronate sodium. BONIVA inactive ingredients: lactose monohydrate, povidone, microcrystalline cellulose, crospovidone, purified stearic acid, colloidal silicon dioxide, and purified water. The tablet film coating also contains hypromellose, titanium dioxide, talc, polyethylene glycol 6000 and purified water."   Taken from the Fosamax website: "FOSAMAX contains alendronate sodium as the active ingredient and the following inactive ingredients: cellulose, lactose, croscarmellose sodium and magnesium stearate. The 10 mg tablet also contains carnauba wax."   Taken from the Actonel website: "ACTONEL (active ingredient): risedronate sodium.ACTONEL (inactive ingredients):All dose strengths contain: crospovidone, hydroxypropyl cellulose, hypromellose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, silicon dioxide, titanium dioxide.Dose-strength specific ingredients include: 5 mg-ferric oxide yellow, lactose monohydrate; 30 mg-lactose monohydrate; 35 mg-ferric oxide red, ferric oxide yellow, lactose monohydrate; 75 mg-ferric oxide red; 150 mg-FD&C blue #2 aluminum lake."   I hope this helps! Best of luck, Casey