Prevacid 24HR contains the active ingredient lansoprazole, 15 milligrams per capsule.
The product details list the suggested age as 18 years and older.
Do not use Prevacid 24HR if you are allergic to lansoprazole. Consult a doctor if you are pregnant or nursing, have liver disease, or are taking prescription medications. Keep out of reach of children.
Prevacid 24HR is described as an acid reducer and a proton pump inhibitor (PPI). Note that one product listing also labels it as an 'Antacid,' but the active ingredient class listed is PPI.
Prevacid 24HR is positioned as a preventive acid reducer that helps stop heartburn before it starts and is not intended for immediate relief; it may take about 1–4 days to reach full effect, while it provides up to 24 hours of control once active.