Hello! Thank you for asking on HCM! Regarding your concern, I would explain that your symptoms could be related to orthostatic hypotension. I recommend consulting with your attending physician for a careful physical exam and some tests: - a Head Up Tilt test - a resting ECG - complete blood count for anemia - blood electrolytes. Meanwhile, I recommend taking plenty of fluids and avoid physical exercise. You should closely monitor your blood pressure. Some changes may be needed in your antihypertensive therapy in order to avoid further lowering of blood pressure values. Hope to have been helpful! Kind regards, Dr. Iliri