Following are the basic investigation of hypertension:

・ Complete blood count-TLC, DLC, Hb %, RBC

・ Renal function test-Blood urea, serum creatinine, potassium, Sodium, calcium, uric acid

・ Blood sugar level

・ Urinalysis

・ Lipid profile

・ Thyroid function test

・ Electrocardiography

・ Urine albumin to creatinine ratio

・ Measure plasma aldosterone/Renin ratio

・ Measurement of 24 hours urinary metanephrines.