BETALOC ZOK 25MG is a prescription medication used to treat high blood pressure and angina (chest pain). It belongs to a class of drugs called beta-blockers, which work by blocking certain natural substances in the body to reduce blood pressure and the workload on the heart. This medication comes in a pack of 14 tablets, each containing 25mg of the active ingredient metoprolol succinate. It is taken orally once a day, usually in the morning, with or without food. Common side effects may include dizziness, tiredness, nausea, and diarrhea. It is important to take this medication exactly as prescribed by your doctor. Do not stop taking this medication without consulting your doctor first.