Hi there, High cholesterol is a risk factor for coronary heart disease. It is one of the 7 known modifiable risk factorrs: 1. Hypertension 2. Diabetes 3. High Bad Cholesterol 4. Low good cholestrol 5.Stress 6. Smoking 7. Obesity and lack of exercise Diet, Exercise, Cessation of smoking and drugs are measures to control these factors. You are doing the right thing by taking drugs for cholesterol, avoid smoking and doing exercise. If you keep your diet balanced, avoid junk food, limit oils and fats intake, avoid concentrated processed high carbohydrates and limit calories intake but take small potions at frequent intervals your symptoms of lightheadedness shall pass. Idea is not to starve yourself. If that does not help please see the doctor for condition like cervical spondylosis and autonomic dysfunction( in view of your reported low blood pressure , need to be excluded. You can tell about these symptoms to the doctor who is supervising your drugs for high cholesterol, your doctor will certainly do a thorough physical examination and may do some tests that will help in reaching a conclusion and institute a treatment. Good Luck. With Best Wishes Dr Anil Grover