system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 25-year-old man presents to the clinic with a complaint of lightheadedness when standing up from his bed in the morning and then from his chair at work. He has had similar complaints for many months, and the symptoms have not improved despite drinking lots of fluids, eating regular meals, and taking daily multivitamin. His daily routine is disturbed as he finds himself getting up very slowly to avoid the problem. This has created some awkward situations at his workplace and in social settings. His blood pressure while seated is 120/80 mm Hg, and upon standing it falls to 100/68 mm Hg. The physical examination is unremarkable except for a strong odor suggestive of marijuana use. The patient denies drug use and insists the odor is due to his roommate who smokes marijuana for medical purposes. No pallor or signs of dehydration are seen. The lab results are as follows:
Serum Glucose 90 mg/dL
Sodium 140 mEq/L
Potassium 4.1 mEq/L
Chloride 100 mEq/L
Serum Creatinine 0.8 mg/dL
Blood Urea Nitrogen 9 mg/dL
Hemoglobin (Hb) Concentration 15.3 g/dL
Mean Corpuscular Volume (MCV) 83 fl
Reticulocyte count 0.5%
Erythrocyte count 5.3 million/mm3
Platelet count 200,000/mm3
The ECG shows no abnormal finding. Which of the following could alleviate this patient’s symptoms?
assistant
Alpha 1 receptor activation