Diet pills alone are not sufficient for weight loss. These pills depend on lots of other factors like a proper and effective diet plan and a strict regime of exercise. If you are a lazy person and do not move around much, then consumption of the pills is not going to help. Consult your doctor first and find the right cause of obesity before taking these pills and see if they work for you. The doctor should also be consulted for the possible side-effects.

Generally, the weight loss pills should be taken as a last resort when other options such as controlling your food habits have failed. Royal Collage of Physicians says that the obesity starts when body mass index [BMI] of such people is 30 or more. People with lower BMI but having diabetes of type two or high blood cholesterol or any other significant disease can opt for these pills when other measures have failed.

This surely is the side effect of taking the diet pills. But the people confront the problem of headaches that escalate to migraine, when their diet plan focuses on low amount of carbohydrates and high proteins. As you cut the carbs in the diet, your body starts consuming the carbohydrates stored in the muscle mass which results in quick shedding of weight. But your brain needs a fuel that is made of 75% carbohydrates and 25% water. You have not told us about your diet plan. But it looks like that you are taking very low amount of carbohydrates. Since you have probably cut the supply of carbohydrates drastically to your brain, it is resulting in sever headache.

The solution is that you should take a balanced diet with fair amount of carbohydrates and burn them by an exercising regime along with taking the diet pills. This way you will loose weight gradually without headaches.