Midodrine Dosing and Evidence for Orthostatic Hypotension

Dosing Recommendations

The therapeutic dose range for adults with symptomatic orthostatic hypotension is 2.5 mg to 15 mg three times daily, administered at approximately 4‑hour intervals during waking hours. This range is endorsed by the Canadian Cardiovascular Society. Moderate‑quality evidence supports this recommendation. [1][2]
The Canadian Cardiovascular Society issues a strong recommendation that midodrine be given 2.5–15 mg every 4 hours, up to three times per day, to improve symptom control in patients with postural orthostatic tachycardia syndrome (POTS). Moderate‑quality evidence underlies this guidance. [1][2]

The 2017 ACC/AHA/HRS guideline states that midodrine can be beneficial for patients experiencing syncope due to neurogenic orthostatic hypotension, with a dose‑dependent increase in standing systolic blood pressure. Class IIa recommendation (benefit exceeds risk) is implied. [3][4]

Piloerection (hair‑standing) has been reported as a common side effect of midodrine therapy. [3][4]
Urinary retention or urgency may occur in patients receiving midodrine. [3][4]