Hartek 2.5mg Tablet is a medicine used to treat high blood pressure (hypertension) and to prevent angina (heart-related chest pain). It is a calcium channel blocker which helps to lower blood pressure and reduce the workload of the heart. This helps prevent heart attacks and strokes. Hartek 2.5mg Tablet may be prescribed alone or along with other medicines. The dose depends on what you are taking it for and the severity of your condition. You can take it at any time of day, with or without food, but it is best to take it at the same time each day. Keep taking it for as long as advised by your doctor. Even if you feel well, do not stop this medicine on your own because high blood pressure often has no symptoms. If you stop taking it, your condition may get worse. Keeping active with regular exercise, reducing your weight and eating a healthy diet will also help control your blood pressure. Follow your doctor’s advice while taking this medicine. The most common side effects include fatigue, swelling in the feet or ankles, sleepiness, dizziness, flushing, and headache. Consult your doctor If any of these bother you, or get worse, or won't go away. Before taking it, let your doctor know if you have any liver or kidney problems. Pregnant or breastfeeding women should also consult their doctor for advice before taking this medicine. You also need to tell your doctor what other medicines you are taking – especially those used to treat high blood pressure or heart conditions. You should have your blood pressure checked regularly to make sure that this medicine is working properly.