Thank you for asking Healthcare majic. My name is Dr Ehsan Ullah & I have gone through your query. Well the symptoms of your might be due to postural hypotension.it can make you feel dizzy or lightheaded, and maybe even faint. postural hypotension is often mild, lasting a few seconds to a few minutes after standing. However, long-lasting orthostatic hypotension can be a sign of more-serious problems. i would like to suggest to change your life style changes including drinking enough fluids such as water; drinking little to no alcohol; avoiding walking during hot weather; elevating the head of your bed; and standing up slowly. also do exercise programs to strengthen your leg muscles. Compression stockings and garments or abdominal binders may help to reduce the pooling of blood in your legs and reduce the symptoms of postural hypotension. Just folloe these things along with prescribed medicine by your doctor i hope you will feel better if not then visit again to medical consultant so that your medicine could be revised. Hope this may help you. Let me know if anything not clear. Thanks.