<s>[INST] Last night at my job I was standing completely still and all of a sudden I felt tightness in my head and shoulder and then all of a sudden I thought I was going to faint. I checked my blood pressure today and it was 155/83. I used to take blood pressure medicine but I had lost a lot of weight with diet and excersise so my doctor took me off of them. In the last few months I have put on a few extra pounds so could this have contributed to my episode last night? [/INST] Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. I would explain that your symptoms could be related to possible TIA (transient ischemic attack). Considering your high blood pressure values at the moment, I would exclude orthostatic hypotension. Coming to this point, I would recommend consulting with your attending physician for a physical exam and some tests: - a Doppler ultrasound of the carotid arteries - a brain MRI study. Hope to have been helpful! </s>