51-year-old female with vitamin D deficiency among other medical problems: high blood pressure, episodes of transient syncope, and sleep apnea. In the expert's opinion frequent changes and discontinuations of drugs as well as big intervals between one dose to another, can be responsible for hypertensive crisis. Therefore the expert recommends to stop too frequent investigations , and instead focus on appropriate treatment, that should be combination of Angiotensin Receptor Blocker and diuretics.