Each tablet contains alendronate sodium trihydrate 91.37 mg equivalent to alendronic acid 70 mg.
It also contains the following excipients: Sorbitol, maize starch, sodium starch glycolate, stearic acid and magnesium stearate.
Alendronic acid is chemically described as (4-amino-1-hydroxybutylidene) bisphosphonic acid monosodium salt trihydrate.