Hello, Thanks for writing to Health Care magic, I am Dr , Muhammad Ahmad , I have read your question closely, I understand your concern and will be helping you with your health related problem. This can well be because of two main reasons. 1) Due to medicine , they can be reducing your blood pressure too much. 2) This can be due to weight loss , it has been postulated that every pound lost causes blood pressure reduction by 1mmHg so you might be having better blood pressure control by now due to weight loss and as you haven t changed dose of medication lately so probably that s a higher dose now for you. The solution to it is simple check your blood pressure when you feel dizzy and best way is to check is when you are sitting and then check it when you are standing if standing blood pressure is lower than sitting by 20 units then this is the problem. If you find this then contact your doctor. He will probably lower your drug dose in this case and you will get fine. If blood pressure is fine then you can try taking the medication at night so that blood pressure lowering happens when you are usually in bed this will go away till you get up in morning that usually helps patients in my clinic to counter postural drop symptoms due to Blood pressure meds. I hope this answered your question, If you have more queries I am happy to answer you. Regards. Dr.Muhammad Ahmad