Hello Thank you for trusting HCM What antihypertendive you are talking not mentioned. Up to 90/60blood pressure OK Possibility of fluctuations in blood pressure 1. Your working in outside possibility of dehydration and electrolytes loss hypotension. 2.diabetic autonomic neuropathy 3 . possibility of episodic arrhythmias 4.infection septisemia 5.assosiated anemia 6.adrenergic failure etc... Reduced arterial compliance in patients with diabetes mellitus has been shown in several studies, but it has not been significantly associated with either atherosclerosis or vessel wall thickness. Blood pressure variability is still poorly explored in diabetic patients. Systolic, diastolic, and mean arterial blood pressure variability was significantly higher during daytime but not night time in diabetic patients compared to controls. Diabetic patients also had significantly reduced small artery compliance, but no differences in large artery compliance, cardiac output, or systemic vascular resistance. The findings suggest that hyperglycemia may affect the compliance of the vascular system, resulting in high blood pressure fluctuations. Please consult your doctor he may advice right medication for you