Of course, you may not need all these medicines. If your blood pressure is normal, your doctor will be unlikely to prescribe an antihypertensive medicine.
On the other hand, if your blood pressure is very high or really hard to control, your doctor may need to prescribe two antihypertensive medicines to get your blood pressure under control.
Because everyone is different, you need to work this out with your doctor. Your pharmacist can probably help you understand each of the medicines that your doctor prescribes for you.
Once you have worked out with your doctor which medications you are going to take, you are sure to want to learn more.