Alpha blockers --Alpha blockers has a big hand in lowering the blood pressure. A patient may suffer from fast heart rate, dizziness or a drop in blood pressure when stand or walk.
Combined alpha and beta-blockers -- lower blood pressure patients experience a drop in blood pressure when they stand up and try to walk.
Central agonists -- Alpha methyldopa (Aldomet) may lower your blood pressure when your stand or walk which result in weakness or dizziness in your body. This drug may also cause drowsiness or sluggishness, dryness of the mouth, fever, or anemia. Doctor's approval is necessary for taking this kind of drug.
Clonidine (Catapres), guanabenz (Wytensin) or guanfacine (Tenex) may produce severe dryness of the mouth, constipation, or drowsiness. Never leave any of this drugs abruptly, it may cause high blood pressure and could be dangerous for you.
Peripheral adrenergic inhibitors -- Reserpine may cause a stuffy nose, diarrhea, or heartburn. It can be treated and the drug has not effect so badly. However, the patients of nightmares or insomnia or depression need to take recommendation from their doctors.
Treatment can be done with the side effects arise from Guanadrel (Hylorel) or guanethidine (Ismelin). It causes some diarrhea, which may persist in some people. Never go in sunshine when you feel faint or weakness. It could be dangerous and low your blood pressure to high levels.
Blood vessel dilators -- the causes of these drugs are not severely but a lower blood pressure patient has to avoid when he/she feels swelling around the eyes, heart palpitations or aches and pains in the joints. Most of the times these drugs only prescribed by your doctor because Minoxidil (Loniten) is a potent drug that's used only in resistant cases of severe high blood pressure. It may cause fluid retention (marked weight gain) or excessive hair growth. Therefore, whenever you feel any symptoms of this medicine consult your doctor.
Causes of lowering blood pressure are also depends upon the conditions of the nervous system includes bleeding, infections, dehydration, heart disease, adrenal insufficiency, pregnancy, prolonged bed rest, poisoning, toxic shock syndrome, and blood transfusion reactions. In the some cases, it is also examine that when an individual has a truly low blood pressure, they will have a lack of energy and frequent dizziness.
Therefore, don't take any decision by yourself. Consult your doctor tell them the problems you suffered. Let the doctor to take right decision for your health.

About the Author
Hoping these tips are useful for people that are trying to lower their blood pressure. Grojan Fabiola is an eperience writer, with many articles written until now, from agriculture to IT development and now aiming health and medicine articles. So if you want to know more about lower blood pressure treatment please follow this link.