The active ingredient is ibuprofen sodium dihydrate 512 mg, equivalent to 400 mg ibuprofen (see "Momentact Analgesico contains: Sodium" under Precautions).
Excipients/Inactive Ingredients: The other components are sucrose (see "Momentact Analgesico contains: Sucrose" under Precautions), potassium bicarbonate, acesulfame potassium (see "Momentact Analgesico contains: Potassium" under Precautions), orange flavouring, aspartame (E951) (see "Momentact Analgesico contains: Aspartame" under Precautions).