<s>[INST] Hi Doctor.. I am a 21 Year old person.. Since Past two weeks i am suffering from Low BP.. I ve approached a local physician but after taking the medicines prescribed by him i feel like fainting.. And now a days before and after my meals i feel like my head is spinning ... Pls advice the reason for this with a proper diagnosis [/INST] Hi, Let me inform you that low blood pressure cannot be itself happening, and it is the medical emergency if ever happens due to loss of fluid from the body even blood that may cause the hypotension (Law blood pressure). Second, it can be due to starvation, low water intake. Third, it can be due to vasovagal shock (most common condition is seeing the bleeding condition). All the mentioned conditions are medical emergencies that demand immediate medical attention. You have not mentioned any symptoms here, as long as the given symptoms that you described here may demand cardiac evaluation and other vascular condition. Till then Chat Doctor.  Hope I have answered your query. Let me know if I can assist you further. Take care  </s>