I have a friend who is having really bad chest pains and is coughing a lot. Whenever he stands up his vision blackens for a few seconds and he gets really dizzy." i had the chest pains all day. my vision now blackens when i first stand up after sitting. ive had to stand still when i do stand up for about 15 seconds cause thats when i cant see and cant walk straight." he said a few minutes ago.Please help him :(
Thanks for your question on Chat Doctor. I can understand your concern. By your history and description, your friend is suffering from hypertension or other heart diseases. So tell him to consult cardiologist immediately and get done blood pressure monitoring, ECG, 2d echo and stress test (trade mill test). He may need antihypertensive and other cardiac supportive Chat Doctor.  Hope I have solved your query. I will be happy to help you further. Wishing good health to your friend. Thanks.